if you want to invest for a long time, choose the POW based coins. dont choose POS tokens. the POS tokens could be very risk and prepared to crash to zero. just the DAO and FTT. when there is problem with the stake, then the tokens is useless. some tokens issued by specific organization, company or some individuals also is very risk. after they got enough profits, may sell all tokens. then most investors will get burned. you may try to diversify your packaged investment with top 10 coins. not financial advise, just what i did on my own.