This is the risk of investment. You are getting fixed benefits in exchange for the price decrease on the token since the reward came from the token profit itself.
You are still luvky that you consistently received benefits for 2 to 3 years compared to other shitcoin holder that literally gets zero rewards and at the same time shitcoin price got dump.
It will be helpful if you can provide your total rewards claim versus your lose due to the token price decrease.
It reminds me of those who invest in a stock because it has a very high dividend. And they get a 10% annual dividend but a 30% annual share price reduction shortly before the stock goes bust.
But no one is without sin, I myself bought FBI tokens when they came out, although I don't think I lasted three months and sold them. Seen with hindsight I did well.