It's good when we know the amount of risks we want to take for a particular investment which is what will help us to define the amount of profits we have to earn from such business or investment. It is good when we tell people that are eager to buy and hold Bitcoin on the level of risks they should be ready to take because the market is very volatile. If we don't disclose that to them, they might end up making severe loses when they make mistakes of selling when they are nit supposed to sell. A lot of people had made this mistakes and they have end up losing severely when they should have decided to hold and sell when they finally makes profits.

The phrase "invest with what you can afford to loose" is simply a buyable advice specifically to the newbies so they don't hastenly get attracted to invest out of impressions of the exciting pace in the ongoing market with its intolerable and not worth gambling funds to be loosed as a case of chasing profits.
Hence it is safer taking early conciousness about the negative sided nature of the Bitcoin industry based on its volatility before venturing otherwise the act of the unawareness could create bridges of unfitted to withstand a y form of unpleasants which may linger to breakdown if the market goes biased.

Talking about to hodl your Bitcoin investment for a long time investment, that is to be considered a better option but not the only way in for Bitcoin investment.
It is wise to decide if you are going for a long-term or a short-term investment so you would verily have your ways, confidence and manners of tempering your trading funds that is profefered to yield incomes.
The clarity is that short-term basically for investors who are not leaned to other sources of incomes or basically a system of investment which one is protected to offer assistance at financial needs which is potentialed to unimpressive running.
While long-term investment would require you to obtain other sources of investment so you could set a non disturbance giving your investments and the market time to run hoping on the volatility of the digital markets that demands patient for a chance of bull-runs.
And this is potentialed to catch up with the marketing values at when bull-runs.

It's easy to say we should have invested more than we could have afforded to lose when we look to the past, but the truth is that the same can't be said about the future, because nobody can predict it accurately.

Of course I do regret for not selling everything I had ten years ago to invest all my money in Bitcoin, including what I couldn't afford to lose, but I have this kind of sentiment right now because I know what happened next. But if I didn't, how could I make such decision?

We can't risk our stability for something which is out of our control and is prone to be heavily manipulated by third party people, the whales. You can't put your fate in someone else's hands, therefore the rule of investing only what you can afford to lose is still pretty advisable even in our present days.

That can be called a risk with very high crypto price fluctuations.
It may be reversible, but in some other crypto it will not be a guarantee because of the rapid fluctuations and how the coin can also be trusted.
This means that Bitcoin can provide good reversible and can be guaranteed, while other altcoins are still not necessarily.
and also with a note that the price reversal will depend on the prevailing trend as when Bitcoin will return to the last ATH certainly takes quite a long time, who is able to survive they will not lose.

Yes, and there will be no rollback on the type of hack on private or Exchange swallows (depending on whether the Exchange implements SAFU or not).

The investment must be done consciously and definitely using money that is not needed as long as the investment goal has not been achieved.

  This is what most people in this field always and often say as investors: we should only invest in what we can afford to lose, and I think this is a useful reminder to anyone entering the crypto business field. .

  As long as we don't forget, as investors, we must also have the habit of being risk-takers so that we can really experience profit in the field of the crypto space, because this is the character that other successful crypto enthusiasts in the field industry have. this.