I think that now is a really good time to sell BTC. Just its rate started to fall a lot and is not going to grow. So it's better to get rid of this currency as soon as possible. Otherwise you risk losing your money. The main thing is to find a good exchange exchange market. You can apply with this question to Binance coin exchange: https://fast-change.net/.
Convenience of cryptocurrency has already been proven. However, it's necessary to keep developing our knowledge and resources. For instance, recently I decided to make my life easier in the crypto market world. The first thing I paid attention to was this article https://tabtrader.com/blog/tab-trader-raises-5-8-m. I was very attracted to it because I can use it directly on my phone. This app allows you to track your trading account and get instant notifications about price movements. Try to use it either.