Everyone has the way they want to handle or be involved with Bitcoin, Bitcoin generally doesn't have to be a plan A or a plan B,
It is a personal decision on how someone wants to benefit from it, they could prioritize other things over Bitcoin, and some other prioritize Bitcoin over any other investments or financial involvement.

No plan A no plan B, just do your thing and benefit in what ever way

Bitcoin allows people to achieve high returns in a short period, especially when compared to other assets. Imagine someone has $100 and wants to invest it. They have two options:

1 - Deposit the money in a bank for the long term say 5 years.

2 - Invest the money in Bitcoin and HODL  it for 5 years.

The person goes to the bank, where they are told that the maximum return they could earn over 5 years is 25%. Calculating the outcome, they realize that a $100 investment would yield a $25 profit, bringing the total to $125 after 5 years. However, considering that inflation will continue to rise throughout those 5 years eroding the purchasing power of their money the person would effectively end up with no real gain. They then look into the potential returns of Bitcoin and discover a high probability of at least doubling their investment over 5 years. Given this, what would be the preferred choice? For anyone, the better option would be Bitcoin. In my case, Bitcoin is my  PLAN "A".

It is very difficult nowadays to invest in an asset or anything else, for that matter that will yield a decent profit after a few years. Most assets offer only small returns, and even in real-world businesses, you need a significant amount of capital, it takes a long time to start turning a profit, and there are high risks involved. With Bitcoin, however, even if the price drops sharply, holding onto it for five years without selling offers a high probability of significant profit. That is why I prioritize Bitcoin as my preferred investment my "Plan A" while treating real world investments as a "Plan B."

As for me Bitcoin is Plan A for a long term while it not Plan A for survival. Causes volatility is going to frustrate you if you should put your money and hope that Bitcoin is going to feed you this month. Year 2022 really shows that short term can be dump even when inflation is high. That DCA with money that you don’t need now make more sense.

Trading can be aside hustle if you know how to play around. But investment is the main deal, hold it and forget about any noise let time do the work.

It really depends on the individual.. Some see it as option "A" and put it as the main position in their investment.. But there are also those who see it as option "B", treating it as an alternative investment.. Ultimately, it comes down to personal preference because everyone has different preferences and risk tolerance.. So we can't have the same expectations for everyone. But for me, I see Bitcoin as option "A" because I don't feel that any other asset offers the same potential as what Bitcoin offers.

To each his/her own but, as for me, I'd rather treat Bitcoin as the option rather than just plan B.

If you consider Bitcoin's features, you'd even think you can't go wrong with it. The mere fact that no power in the entire universe is strong enough to add to its overall supply already means so much. There's no other investment that's guaranteed by math.

Other than that, there's no person, government, company, or anything that's powerful enough to shut it down.

These two alone would somehow make you at ease with your bet. But, of course, it doesn't mean you'd go all-in on it. Diversification is always advisable.

In my opinion, after we deeply understand Bitcoin the next step isn’t really to immediately choose Bitcoin as option A or B, but what we need to do first is set a clear goal. For example, do you want to be actively trading short-term, or be a long term investor or even combine both according to your capacity? Because if you don’t have measurable targets, like in profit, time and the risks you’re ready to face then any choice will feel confusing for you. 

So if asked about the choice our decision really depends on our own understanding, starting from regular income and how much portion can be allocated without disrupting basic living needs. Many people make business their main investment and then put Bitcoin as a long-term asset (option B) because of its nature as a store of value.

Learn about risk management, life is not a sprint but a marathon so you need to pick the longest option that can give you the desired result rather than some quick money and to balance the risk and avoid the capital loss, there is something called diversification. SO it is wrong if you go 100% on bitcoin trading or not, it has to be in a moderate leve that is possible for you to manage when things go wrong.

That's a strange question to answer. Most of us work full-time or freelance in digital world and we depend on our monthly salary, so, for us, Bitcoin can't be plan A because it doesn't generate our only income, it's mostly plan B because we invest in Bitcoin and trade with Bitcoin during our free time, it's never the thing on which we completely depend (we depend on our salaries though).
Bitcoin is mostly a plan A for those who have Bitcoin related businesses like exchanges, hardware and software wallets, Bitcoin payment gateways and so on.

After the right question are been answered you can still miss the road because you will have a decision to make, but are you scared to make the wrong decision? If yes then how will you grow?

Do what you feel it's best for you, I can advice you to put all your money on Bitcoin and one day you lost access to your Bitcoin wallet you will still blame me for advising you..

My own decision is to use Bitcoin as my investment and assets, even my own bank too, you don't have to do the same but I will advise you to do diligent research on Bitcoin, who knows? It can be something you have always wanted, utility wise.