No, investing is not gambling. Let's break down the differences between the two.
Gambling = you are up against the dealer and the dealer makes the rules.
Investing = is a battle against time and emotions; if you can stay the course over the long term spanning one or two market cycles, the results will be commensurate with that duration. In other words, in investing, it is time that pays you.
If the rules of the game are flawed, investing can easily turn into gambling; if you choose the wrong assets and mishandle your investments, the risks are immense.

I do not wish to compare Bitcoin with altcoins, as the differences between them are vast, if you are looking for the best investment, choose Bitcoin, history has proven its worth. Its supply is limited, which is why nations and major corporations are beginning to adopt it, given its incredibly strong fundamentals.
Before purchasing an asset, ask yourself:
1. If the asset you buy drops by 40%, can you still remain calm? If not, it’s gambling.
2. Am I using money that I can afford to risk? If not, it’s gambling.

It is highly unethical to label investing as gambling, because if you purchase the right asset (Bitcoin), hold it for the long term (4–8 years), and employ the right strategy (DCA), then it is an investment.

When I read what he said, I was surprised to see that some guys can actually go to any length of taking more risk in something they already know that is very risky, going by what he said, it is not like he is not informed about the risk in those shitty shitty, rather he is just concerned about the time it will take him or her to get the percentage he mentioned if it has to be Bitcoin, but as someone who said he knows the risk involved, the same risk do not matter to him, so it is the profit I guess, whether he loses all he invested in the shits, it will not matter to him, and what do we call that.
So people can be so mean to the extent that they do not care about what could happen to their hard earned money, although the decision is his, however, I'm still in shock because some statements can be unbelievable, BTW, who has pump and dump shit help.

The problem we are having is, some individuals makes bitcoin investment harder than it supposed to be. People need to allow the time to help them build up their wealth with critical thinking and good financial decisions at a earlier stage of life, but they choose to force themselves by chasing a luxury life from one place to another, and at the end of it, they end up regretting. The facts is, wealth is rarely built just overnight, the wealth actually builds by from making a good decisions and be gives every decisions one's made a long-term enough to mature, and that's why being consistent enough matters alots, excitement can come later after all the struggles,but building a strong financial position is important, by investing much of your incomes into bitcoin investment for better future. I attest that there are people that spent money unnecessarily, so instead of that, Channel it to DCA inro Bitcoin and sticking on the strategy, stay discipline and bear any market conditions, advisablelly for newbies, you should always invest with your discretionary income.

Is making such mathematical calculation actually significant? For me there's no point trying to calculate the profit you would make and the time it will take because it can turn to unnecessary worries, that Bitcoin investment is not guaranteed is enough reason to undermine these calculation. Your target as per how long you plan to hold and how much you can afford to invest is more important than making such calculation that is not feasible because volatility will keep taking it's hold. Bitcoin hitting another all time high will mean a 100% with the price now but how long can not actually be calculated, so there is no reason worrying about that and so nothing special about such calculations.

Their is no where it's written in stone that because you are using the dca accumulating strategy to buy and accumulate Bitcoin, you must buy and accumulate with an exact amount. What I think is more important is consistency in your accumulation, and the size of the amount used to accumulate consistently will depend on your discretionary income, because if this week you can invest with only $20, you can still invest next week with $30 or more if you have more discretionary income available, so I disagree with that notion that it must be an exact amount, because I believe that consistency in your accumulation is the most important thing, no as you are proclaiming.

If someone decides to invest, they should understand that investing is an activity that will not make them rich after a couple of months, because here money is added not according to an arithmetic progression, but according to a geometric one. And this guy should have that in mind. This means that small amounts are very important when investing in bitcoin, because after a while such an investment plan will outpace any money additions in absolute numbers. But not every investor will be able to visualize this in their head, and as a result, become confident in their step-by-step, measured investment plan. It's not as easy as it sounds, but it's actually not that difficult. It all depends on the investor's discipline and mathematical skills.

The use of funds to invest in Bitcoin is indeed very flexible, no matter how much you have, as long as those funds are discretionary, you can make a purchase.
As we know, while we may have a steady income from our jobs in real life, our weekly/monthly expenses are not fixed, various factors can influence them, and there are inevitably unexpected expenses. Therefore, maintaining that amount will be quite difficult, while maintaining consistency in accumulating Bitcoin must indeed be the primary focus.

To answer your question.
The best way a small investor can make good profit from bitcoin is not to just buy and hold (hodl). Before investing in bitcoin you must have it at the back of you mind that bitcoin investment is not a quick profit scheme, even big investors are not into bitcoin for it's quick profit mechanism.

For you to be able to make profit you must be consistent in buying because as you said you are a small investor, you can apply DCA method or any other method you choose to purchase Bitcoin.

You must also understand that Bitcoin is an Asset so you will have to hold on to it for a long time (probably years).

The greatest features of bitcoin is it volatility and scarcity and that what's makes it a good digital asset and not a quick profit scheme. So do your research and invest. And please do not use the money you've set aside to emergency to invest.

You have been registered on the forum since January 2017 @gabbie2010, and you still have not come to realize that it is better for newbies to buy bitcoin at any price, and maybe to buy for 4-10 years or longer without any assessment of BTC price because first a newbie is not going to have any clue whether the bitcoin price is going to go up, down or sideways, and so the ONLY way to prepare for UP is to actually buy some bitcoin.  Waiting is not a good strategy.

When you got into bitcoin in 2017, did you wait?  If you waited, you got fucked by waiting... but and so maybe you did not learn any lessons from your beginning?  You have been in bitcoin for 9.5 years, and you haven't figured out that it is better to ongoingly accumulate bitcoin, especially for newbies.  I did a quick glance at your posting history, and you don't seem to have had been too involved in shitcoins or trading, so what went wrong?  Why don't you recognize the value of ongoing bitcoin accumulation?

For example  if you had focused on accumulating $100 per week in the past 9.5 years since your forum registration, you would have had invested $500k in to bitcoin  but you would have nearly 5.5 BTC, which surely would be a great place to be.  You think that you need better accumulation than that by fucking around trying to time the bitcoin market?  It is almost impossible for anyone to time the bitcoin market whether they are newbies or not.... and at least the longer time bitcoiners can figure out if they need to change their bitcoin accumulation strategy (and intensity) based on how many BTC that they had already accumulated. Yet, newbies, by definition, have no bitcoin or very little bitcoin, so they should stay focused on accumulating, rather than fucking around waiting for dips that might not end up happening.