The price of bitcoin is falling now so even altcoins in the coinmarket are affected by the fall in the price of bitcoin so for me this is the time to buy altcoins with potential and longterm I am sorry for your statement but if you buy bitcoin and altcoins now and leave it for 3 years I'm sure you will make a big profit.
With Bitcoin yes as it's been test by time, while with Alts not sure unless you sort it up.
Investing with project with solid foundation which in the long run ill bring you pure development and real usages,
from that event you'll find yourself harvesting the profits that those coins will give you 3 years is long enough to see
which project aside from Bitcoin that will flourished and gained huge benefits.
I guess OP's decision to leave and take all the profit that he/she can have as long as the bitcoin market just don't dropped it's market value in its lowest then it is what he/she thinks is the best decision he/she could ever made to spare from the huge lose ahead. We couldn't question his/her decision coz we all have our own percerption when it comes to the current situation of bitcoin market value. So far, i'm still hoping for a good market feedback despite of price dropped happened.