Because market of crypto can not be predicted.
No ones knows flthe future of it, and we all have seen the journey of the market since the last pf 2017 till thr middle of 2018, it run fast.
And the wave was so far, the market is getting crazy day by day.
No wonder if mny people afraid of investing in crypto.
We should use bitcoin more and more as much as possible because actually the increasing popularity increase the value and importance of bitcoin worldwide, we should tell other people about the safe investment of bitcoin, but now a day nice investment is being done by the people as now it is trust worthy for them only a few % of people in my country dont trust bitcoin otherwise almost everyone is aware of the good benefit of bitcoin.