1. Lethargy during a sideways market
2. Disregarding your strategy
3. Chasing somebody elses dream
4. Believing somebody elses FUD
5. Using money that you shouldnt be
6. Failing to properly do a self risk analysis before investing
If you can cope with these dangers then this type of investment will do well for you. This is a hands-off, long term method of investing. DYOR, find good coins with bright futures, buy and hold. Dont worry about the daily percentages
If there is no hodler of coin, probably prices moves down until it becomes 0 value. I believe that there are dangers in holding coin per individual person but it helps a lot for the community to be strong even there are storm. If we always hold coin and does not sell it at low price then we will make dollars of money.