I am not sure if you are referring to bitcoin's age or the buyer's age. Considering the first one, because that is more fixed, it has been here for <20years but even then it would be a huge gain if someone bought chunks of bitcoin several years ago.

Gold will also have its pros and cons, it is not worth nothing. These are all different asset classes and the wise thing to do is to keep all types of assets classes in your folio and give them weightage as per your choice.

Traditional assets, precious metals, bonds, crypto can all be part of it. Dont go all in on one of them.