tl:dr
Will deeponion hit $3.00+ again or is it a scam?
You are not a dummy we all probably have bought the top of one coin at one time or another but your basis for it getting back to $3 otherwise it is a scam is hilarious. That isn't how the markets work sometimes coins aren't successful but that does not mean they are scams. Fwiw you have now gotten back to your break even point I hope you can now not call it a scam because it has solid fundamentals and will crack top 100 imo in 2018.