You don't need to be a master of technical analysis to invest in bitcoin. Or need do any research.
It's inevitable to do your research sometime. You should never put your money in things you don't understand. If you're about to enter bitcoin, you should learn how it works theoretically, a little bit technically, and read about its history.
The amount of bitcoin decreased? If You bought 1 bitcoin it is still 1 bitcoin.
Profit is both realized and unrealized gains. 1 BTC = 1 BTC, but you have unrealized losses.