Yes for sure it is hard to leave bitcoin because we have long history with it. Leaving it after investing can damage our profit. Gold for me is not good choice because it is an old fashioned investment which needs huge amount of to invest the profit will be too small along with huge risk as keeping so much gold at home can make you suffer someday.
Everything is just a business. The market is filled with investors. Everyone keeps analyzing the markets and keeps shifting their funds based on the revenue they get out of it. Hence let it be gold, bitcoin, land or etc, its just an object for an investors. As long as bitcoin and crypto currencies support investors gain profits, its going to be the next object to be looked upon. It can be either gold or anything else.