should everyone be worry when bitcoin crash to 50% or 90%

I have some investments in crypto currencies, and everyone talks about the problem with investing in crypto namely the unregulated and volatility. I only invested in small number of coins just to experience it out. It is surprisingly, I already have double my investment if I cash it out. And like many other people, I seem to be a little bit greedy and would like to wait for it to go more higher. I have bad experience with Litecoin, and I spent only $58 per coin. When the price of Litecoin go to $130 I sold all my coins to make profit.

I am very happy as I have double my investment and the profit I made from Litecoin, I put into other small coins like Ripple, ADA, and TROX. Just this few days, Ripple, ADA, and TROX have double or triple the value. I should have cash out and put my money back in to my bank.

I think crypto is not the real money and it could be a good and a bad investment. If you are not that greedy, make some money and get out of it.