I don't suggest he swaps considering he made profits off the token. It a great idea of converting to fait, and withdraw. Also mapping out the money to be invested in the other wether it worth it or you re-invest.
But still be cautious of Altcoins, make profit and withdraw nothing is certain, invest in Bitcoin which has proven and not mere pump and dump coin.
We all are in for the profit, so if a token that we currently have, earns it for us, then they are worthy to keep except only if we are 100 percent sure that they will collapse later on. If the platform allows, we can just swap them right away to the other coin of our choice as I think that is much easier and maybe we can save some transaction fees with that than doing it the other way around.
Holding a crypto is better than having a fiat in terms of inflation and with the popularity cryptos currently have, it is now possible to use them directly. Soon, fiats might even become obsolete which is better and a dream come true of a crypto enthusiast like me.