Now those who can hodling bitcoin can sell it after few years with good profit. But I think it is totally safe to invest in bitcoin. Those who invested in bitcoin earlier have got a lot of money. So I would say if someone wants to invest safely and profit. It is necessary for them to invest in Bitcoin. I know that after a few years the price of Bitcoin will increase several times, so I want to buy and hold Bitcoin.
We says that those individuals who already have bought bitcoin will have the opportunity to earn more money then present one but it is also true that today's investor will be more profitable than investors of future because price increases as the years elapse.
Investment in Bitcoin is really helpful but for those who have large sum of money and they don't utilize their fund putted in bitcoin as an emergency fund.
I think everyone cannot take revenge easily from bitcoin as its understanding of market is not easy for all investors of bitcoin therefore when they did not get return well then they initiate hold liable bitcoin.
First understanding is important and other thing is the calmness over emotions in bear market and third is to leave the putted money for longer timing without utilizing it in urgent situations.