Doubt in what? That you made the right decision to buy bitcoins? I'm sure going in you knew that 20% swings in Bitcoin price are very common so that volatility must have been factored in?

Don't get me wrong, I'm not trying to belittle your concern. I'm just saying that checking how much you're down a few months into a long-term investment is counter-productive to the whole "long term" idea.

I used to chart my "wealth" (cash, stocks, house, retirement accounts, and then bitcoins too) in a spreadsheet on the 1st of every month but then I reached a point where even a 1% drop in the "market" seemed to negate my entire month's earnings, so I decided to do that only once a year. It been going only up since then. Magic.