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I am not that good on suggestions . Buy steem for sure and hodl it .
If you want to go long on your trades search for the "big" names : BTC,ETH,XRP,ETC,XMR,LTC,STR,DGB,SC and try to buy them if they have a "bad" day or period (drop) .
Keep an eye on EOS it will be released on June 26th.
Search for trade posts here there are some people who give advices better than mine.
Hope i helped. :)

Thanks for your help :) I'll have a look at the trade posts!