Legal legislation changes over time, and therefore banning Bitcoin or allowing trading will not benefit investors unless there is a clear law explaining how to deal with cryptocurrencies, the exchanges that are allowed, the registration conditions, and the accompanying tax data. If there is no clear legal legislation in your country, it is better to buy Bitcoin not trading, but rather a long-term investment.
The only difference is that after the ban is lifted, there will be a greater possibility of the existence of exchanges, and therefore the commission fees are lower (in P2P it is high), in addition to the possibility of trading and other options.