Bitcoin has no intrinsic value
Try and change the title because it gives wrong information about bitcoin. Bitcoin is an asset, it is digitally created but it has an intrinsic value.
Is it really the best way to invest your money?
I can not say it is the best way to invest but it is one of the ways to earn passive profits, just hold, leave it for long time and make profit from it.
Because of the way Bitcoin generates value or becomes more expensive, it could potentially lose all its value and became worthless.
Who assures you that this will not happen?
If early adopters alwere thinking like this, they will not buy bitcoin and nothing will be like institutions that are now investing in bitcoin. If institutions are also thinking like this now, they will not also invest.