I have already Purchased ETH,NXT,XRP,START. When BTC starts to go down and down, what happened to those coins ?
If you decide to buy a crypto currency for a long time, then buy and forget about it and do not care about the fall of the course. A year later, look ....
That is a strategy which is usually a good one.
The result is most likely to be one of these: the value increases multiple times, it is worth nothing or next to nothing.