I think it is not easy to switch from trading currency pairs to trading cryptocurrencies. Indeed, in fact, this is a different trade, which is very different from each other. In Forex, traders, in fact, do not trade currency. All the time they make bets among themselves - who is the best to predict the future exchange rate. Forex is a kind of gambling club. The trader opens a deposit denominated in some currency, usually in US dollars. Whatever positions he opens, he still only owns dollars. For example, if a trader buys eurusd, it does not mean that he becomes the owner of the euro, it only means that he made a bet with other participants in the game that he expects the euro to rise. If the eurusd rate rises, the trader's position in dollars increases, if it falls, it decreases. Physically, a trader does not own a single euro, even if he buys eurusd for his entire deposit.
The world of cryptocurrencies is completely different. Cryptocurrencies are traded on exchanges, in contrast to forex, in the very coins that are used. Each trader has the coins that are in his portfolio, and not their equivalent expressed in the currency of the deposit. He does not make a bet, he actually exchanges some coins for others and at any time can take them to his wallet. Trading does not go through imitation, but through real exchange operations. This is the main difference between the forex world and the cryptocurrency world.
Therefore, it can be difficult for traders to switch themselves from one trade to another.