So, how do you trade in these cases? Only p2p exchanges? But it's not flexible and you may miss a good time frames where you could profit 1-2% of your balance.
There are literally no restrictions in trading in reputed exchanges and if you think you trust the exchange then you carry on with your usual business. The only advice anyone sensible would give is not to use web wallets or exchanges to hold the coins for the long term as there are many who does the simple mistake of holding the coins for the long term in exchanges for the ease of trade because of the network congestion.
I've used Xapo at one point (2015-16) and BitGo, which until recently had the majority of my coins. I had no issues with BitGo, I was also provided with the private keys on sign-up. Furthermore, I never had any issues with the support or the wallet itself. It's one of the online ones I would totally recommend. It also supports Litecoin and Bitcoin Gold or Cash, don't remember which of the two.