I think that long-term investment and choose the best coin, will definitely bring people huge profits. Long-term investments are safer especially for newcomers and those with little investment experience.
Safer for new comers and with little investment experience? How can be Bitcoin and other cryptocurrencies be a good thing for these newbs? They are not even used to invest on the most common and popular investment and you will be suggesting them cryptocurrencies?
The first reason why these cryptocurrencies are not "safe" to them is because there are a lot of scams that they don't know about. If they are new to investing and they will be investing on these projects, how will they know the legitimate project and the scam? Scammers are so smart these days that you can't tell the difference of the legitimate to the fake. Another one is that we all know of, they are volatile. We all know what happens to investors that has a weak hands, they don't earn profit. They quickly hands off to investments that falls down and they don't wait.