Yes, it is true that perseverance is the mother of success. One of the toughest thing to do when it comes to crypto, is the ability to hold for long.
I had a discussion with a friend. We decided to hold our tokens, because we had fiat to fall back on peradventure there is any need for it.
Presently, it is a different story, we are now in need of fiat, but all the tokens we presently hold have dumped. If we sell now, we would sell at loss, but getting money without selling is quite difficult.
As a matter of fact, we are seriously deliberating on what to do, yet we kept on telling ourselves that "it's just for a while."
I would say that perseverance is just a part of success in holding crypto but not a mother as what you said, it should be a combination of four elements which are intuition, patience, luck and lastly perseverance, we are now in a very dizzy situation and these elements serve as a supplement to keep ourselves in focus, to sustain the downswing of crypto.