The best option is to store in hardware. Saving in trading is not recommended. But you have to know that currently the cost of moving balances is quite expensive, especially Bitcoin. So there are other problems, but maybe using another network could be a solution. But I'm sure most people are happy to keep Bitcoin for investment. Even today I also keep some of the assets I trade in exchanges, even if it's just a little bit. If you are starting out, it's good to start with small money. After that you will learn other problems related to trading investments.