So here is the list of coins which we will advise you to add in your portfolio without any worry for long term.
1.Etherium : 450-460$
2.Neo : 30-32$
3.Cardano : 0.12-0.13$
4.Nem : 0.14-0.16$
5.Stellar : 0.17-0.19$
6.Icon : 1.4-1.6$
7.Steem : 1.2-1.3$
8.Nano : 2.1-2.3$
9.Substratum :0.18-0.20$
10.Credits : 0.25-0.30$
And lots more, these are one of the best right now.But do your own research first and buy whatever coin you like.Hold them and tell us after 6 months, some of them will be minimum 3x-5x