Crypto broker and crypto exchange these are probably two different topics. Binance, coinbase or other offers MT4, MT5, cTrader platforms? or are they licensed to operate?
Yeah you need to decide on whether you want to use a broker or exchange. You asked about IG previously - very good broker and now offer a crypto account but the leverage will be significantly lower than is offered by offshore brokers.
Depends on the leverage you require and if you use scalping/hedging strategies.
Some regulated brokers will limit some practices and leverage will be curtailed .
I find LonghornFX reliable for both Crypto and Forex. Withdrawals are always made within a couple of hours. They have a very helpful customer service team available 24/7 if you have any issues.