"I am afraid to dump it because the momentum may change and could easily jump big time but I also feel I am losing money waiting."
You'll probably be waiting a long time. It's a trading vehicle, not an investment.
I just did a quick check, and GME has moved above $20.50 six times in the last four and a half months, and ten times in the last 53 weeks. That was just a random price I chose. Point being, it's volatile in a range. Downside is limited by low P/E and buybacks, upside is limited by business model and consumer fears. This has been and continues to be the story and the trade.