Trading is a very risky part while investing is you're always is a safe zone. Why? Because you can hold it depend on how long the time frame you want and the profit you have been targeted on it.
Not necessarily. You being in the sort of "safe zone" completely depends on what you're actually investing in. I mean, you could hold certain penny stocks for god knows how long and you could still end up in a huge loss.
What I mean is to stick with Bitcoin when you have a plan for investing and hold it for the long run.
You will end up huge losses if you were invested in ICO's project the usually end up almost nothing. So, all of these were depends on your own research on which potential coin good to hold or to trade.