The question says it all...what coin has the brightest future and is worth HODLing ?
Obviously top ten coins will be always most good for HODLing. If you mean cheap tokens\coins, i think here every person will have it's own opinion and only time will show who was right. I like LCS or BNK.
For the top coins I will not suggest for top 10 coins but I will suggest for top 100 coins as in the recent months I saw a number of coins which were in top 100 and the price of them increased much more giving a better profit to the holders.
For the cheap coins he have to study that how much the developers are active for it to increase mass adoption.