Bitcoin
I have been using bitcoin and other alt coins for about 18 months. I've done OK on coins like BTC and LTC and i have also bought coins for the long term in projects like bitdegree.
I've found that watching the price can be nerve wracking but also acknowledge the great high in seeing your portfolio double! However, recently i have taken my coins and tokens and put them in an offline wallet..
I have a look at the price every other day. It has taken out the worry for me. The trading i did with tokens now seems very counter intuitive. I've realized what i earlier thought is best. Chose some coins i like for the future and just HODL!!!!!
I also have purchased coins and keep them in a hard wallet. HODL!
I agree 100% with you. Trading can be nerve wracking!
For future viewers: price of bitcoin at the moment of posting is 9629.60USD