Investment always have element of uncertainty. Its always based on speculation of success which may not always be so.
So, its a game with two tails....success and failure.
Investing in Bitcoin is based on speculations and it is not like stock that is not that volatile.
Anything can happen with Bitcoin so investing in Bitcoin has risk as always but it is higher than most of the assets where we invest our money. I think the biggest lesson that I've learned is the act of being patient when you are holding coins at a loss. I'm not buying Bitcoins right now since I always got some satoshis from my current signature campaign but when I was still new to crypto, I tried to invest a small amount of my money and bought Bitcoin. Since I was new at that time, when I saw that my total money is in profit already I sold my Bitcoin at that time and weeks after it went up so much. If I stayed patient at that time and kept my Bitcoins, I should've got more profits at that time.