I don't sell spot crypto. I use derivatives to accumulate at a better price.
On second look, seems I mis-read my Mara positions. I actually have less than 30 contracts, but it's all good, I am diversified among most all the miners. My shortest dated Mara options expire end of next year-- I may start to think of closing them out tomorrow as I've milked over 60% of value out of those ones.
If you were a little educated, you would have properly made a criticism in that the energy cost Mara uses is quite high compared to some of its competitors (hence they are using other methods to accumulate). But, sadly it looks as though that's above your level of understanding in this asset-class.
If it were not for this one blemish of Mara, I'd let all my contracts ride a lot longer.