Hey Jenialy,
Yes, it happened at the end of 2018 and the beginning of 2019 with the Bitcoin. The brokers stopped trading with it because so many traders were profiting. Few of them nearly bankrupted.
These are shock times for the broker because of the clients’ profits. So the only logical and legal thing that can do is to pause or stop the trading of the volatile assets….we can’t do anything about it but to look for a broker that keeps the trading.
This is why it is good to have 2-3 accounts with different brokers so when such opportunities appear, you can take advantage.
Cheers,