I think the best altcoins to hold right now are ethereum, litecoin and binance coin. Because of the coins I mentioned from the beginning of
this year the performance was very good at all. I think your choice of coins for NEO and LINK is already an option good for hold. But for IOTA
and BTCT in my opinion is not good for hold, if IOTA this year the performance is not good and for BTCT new tokens that are still doubtful potential.