RE: made $19000 in 3 weeks with ripple coins and some other altcoins should i sell?
It is your money. You will loose or win. Noone else. Don't listen to anybody else tips on when to buy or sell :)
Imagine that all exchanges will shutdown for 4 weeks. After those 4 weeks you will be able to operate as usual. They send you a notice, also.
Then, will you feel confortable with the Ripple you are holding? In 4 weeks many things could happen, and during those 4 weeks there would be no way to sell or buy tokens. What would you do, then, before that shutdown starts?
If you think that Ripple value is much higher than the one it shows now, then a good startegy would be to hold.
On the other hand, if you think that Ripple price is due to speculation over current news, then selling will be the best thing to do.
You make the choice. You will loose or win.
I think ripple is 1 of the few altcoins that actually have something good to offer.