I feel you. There was a time when I was only using Bitcoin, and it's been for about two years. Then 2017 came, and the altcoin market started flourishing. So I've made a couple of mid-term investments: Ethereum and Litecoin. Both were a huge success. Then during the most bullish times I started investing at other altcoins and tried to do a bit of trading. Needless to say, I lost pretty much everything when the prices rapidly went down at the beginning of 2018. I invested a very small amount of money, though, so it wasn't a big loss for me. But trading seems too hard to me. It's way easier to just buy something and hodl. It's also more profitable from my experience, but the times are very different now.