The way you explained poker and investment in three steps being comparable is right on point. You can as well compare it to wheather your life is successful or not. Your life might be as well a poker game and you may not know about it.

Play only good hands

Hold the strong once such as bitcoin, ETH, EOS..., believe in your hand, believe in your investment.

Don't get bluffed out

Don’t panic sell, don’t get fulled about your investment going to zero.

Know when to fold

Knowing when to buy and when to sell is the difference between successful poker player or investor.
At the end patience is very important, because patience always pays off. On the other hand panic and greed is your biggest enemy. Not to panic and not helps you to invest only whatever you can afford to loose, that’s very important as well.