I would add that jumping into cryptocurrencies is much much harder in several aspects:

1.- You have to fight your "fear" of entering a new unknown world.
2.- You initially have to deal with all people surrounding you (friends and family) questioning what you are doing
3.- You have to add the learning effort to decide where and how to invest.
4.- You have the added extra effort of not having your money stolen from all the hackers.

When starting to practice a sport or initiating a diet, your surrounding people usually support you, they do not question if what you are doing is correct, there is much more information or coaching you can count on and not so many changes to lose your money!!!

Probably because of all that, your efforts may be compensated with a nice reward.