Can you advise me some coins on which to invest in middle / long term except bitcoin (too expensive for me...) ?
I already have some Ripple, Dogecoin, Iconomi, ETC and Lumen.
Thanks.
Invest in XMR as it has great prospects in long term and if you invest in it right now then you will surely not regret in future as it will give you the best possible returns on your investments and its safe in compare to other altcoins.