Don't be dumb like Simmons! He may be a great bass guitarist but definitely not an investment advisor. So don't listen to him and follow the traditional way of investment - diversify your portfolio! There's nothing to stop you from investing in bitcoin and gold and stock simultaneously. So never go all in with a single asset.
It's a good practice to always diversify your investment portfolio. Have every possible assets in the portfolio. If you are bullish about bitcoin, give higher percentage to it. But never ever go all in. That might be the dumbest idea you will see!
That's what I thought too right away because of the title, going all in is going to be dumb especially if you don't exactly know what you're getting into. I don't necessarily agree with diversification though, I feel like at the first stages of investment, it's important to build a strong foundation so investing in only one crypto that guarantees a growth is the first step.