Mt4 is good for forex but shouldn’t be used for crypto.
We know that forex trading existed long before the discovery of cryptos and Meta4 was the in-thing then. That explains it. MT5 is a new discovery and an update on MT4. So, it's expected that most forex brokers are already hooked up on that platform. I've also see a broker that has Mt4 and Mt5 platforms. It's a matter of choice, I think.
So it’s great if you lose all your money but if you actually make a profit they will use any slight error in their terms agreement to void the trades and close your account. My advice is get a real broker.
That's the way of criminal brokers and we've them a lot in FX. The advantage FX trading has over cryptos is that such brokers can be reported to regulatory bodies if you've solid proof against them or you drag them to
www.forexpeacearmy.com (FPA) which they dread. I once took a broker to FPA and won my case against the broker.