I meanwhile exclude weekend completely from trading even if there might be crypto prices throughout from MT4 brokers, I think they are not the most reliable ones. My tries in this direction where a little while ago so I don't have an overview of MT4 brokers anymore offering this service at all.
Trading cryptos 24/7 I guess you have to trade them at crypto exchanges directly. If you have Zorro S and the latest beta you can therefore use the new Coinigy Plugin.