When buying crypcurrency, Buffett said, "You do not invest when you do it. You are speculating. There is nothing wrong with that. If you want to bet others will come and pay more money in the near future, it's a kind of game. But that is not investment. " Are we participating in a game?
As long as you have knowledge of what you are doing, it's the best option of all. Also, Bitcoin is not a bet, It is an investment and how any investment allows us data and information (incomplete) to help us make decisions.
We speculate?! Yes, but we also do it with any decision in life, no decision is 100% safe or it has complete information.