Buy at least a few other asset classes to hedge your bets e.g. shares, bonds, commodities, property....... vintage wine, fine art etc 
Are bonds an investment or a way to keep your money safe from inflation? They don't appreciate in value much.
Shares as a hedge? Like when you buy Gamestop at the right time?
For me the best way to be cool about Bitcoin is holding long enough. When you can say you had it for 3 years or more, you learn not to care about FUD or flash crashes. You'll know you can't lose on this bet.
Bonds shoot up when stocks tank. You can see this last March. I only hold a few bonds as a cash proxy, as most serious investors do. Bonds also pay interest, although that is negligent at the moment.
The idea is you cash in bonds to buy stocks during stock market corrections.
And yes, I have held bitcoin for more than 3 years, and it makes up about 10% of my portfolio. I have recently been buying DeFi tokens as a fun bit of speculation too.
I am still mainly invested in stocks and property though, and am actually a bit worried for you that you think Bitcoin is the be all and end so much that you mock stocks.
And, yes, you can lose your bet. It is a bet.