How long do you think I would have to wait until I break even or see profits? I bought nearly all my coins near ATH, unfortunately.

For example - I bought NEBL when it was trading at around $48. It is now $14.04. I bought SUB when it was trading at around $3.25. It is now $0.54. Bought DRGN when it was trading around $5! It's now $1.41. Everytime I see portfolio, I really wonder how much longer time it will take for me to at least break even or see some green. Sometimes, I get worried they will never recover. Should I be worried? Realistically, how long do you think I might have to wait to see some turnaround? Thanks

It might be a couple of years. As long as your coins remain listed on the exchanges (which is by no means guaranteed, they delist non-performing coins often), then someone down the line will pump it.
If the coin gets delisted, then it's over - the price can't rise if no-one is trading it.
Hopefully this was a lesson not to get caught up in hype and to research trends before going in. We've had these alt hypes before, most notably in Dec 2013-Jan 2014, when lots of people got burned.