If I was at your place I would have sold them off long time ago since every time the trend would change and the old coin projects would become dead.... So it's better to go with the trend coins and you should sell them off right away and book the profits from those coins
So basically you should sell the coins that you were holding from a long time and cut the losses instead of trusting on the dev team members and hoping that they would create something good in that time which would lead you to make decent profit. If it would have happened to me then I would have kept the coins with me as even if I sell those coins then also I won't use that money somewhere, most probably I'll spend it on booze and girls to be honest, then why not just keep it there and hope something good happens.