what do you mean "it often fails"?

the only way you fail is if you didn't "invest" in bitcoin and were trading instead and were losing money on trying to predict a market that you didn't have any experience in. or you were then investing bitcoin in an altcoin and since they always tank you lost money.
otherwise if you really "invested" in bitcoin (which means buying something and not touching it for a long time) there is no way you could have failed so far.