In terms of usury, it is usury without a doubt, and another possibility may be wrong.

Someone said that putting Earn in any currency is considered usurious interest in Islam. This is true if the capital is fixed and the interest is fixed, but since I put my money in Ethereum and Ethereum may fall while I am in Earn, then I may be exposed to a big loss and I will not benefit from the investment to earn. I know that any trade that is exposed to gain or loss is permissible according to Sharia.