There is some problem with bitcoin. First is not all markets recognize bitcoin, second is that it is hard to earn because sometimes by not meeting face to face with the seller you may get scammed, and it is always happening.
I dont think we are easy to get scammed even must sell bitcoin without meeting face to face with the buyer/seller due now many trusted exchanger and trusted local exchanger, it's already not be a problem again.
why the market does not recognize bitcoin because bitcoin not get support from the government and also bitcoin is not legal currency in some countries but instead bitcoin has the advantage that does not exist in other currencies, the second was not bitcoin problem but buyers because it is easy to believe and now there are many exchangers are reliable. be smart buyer