It's hard to tell if Bitmain will blow up or not. They're selling their Antminer T15 for $840 right now. How much money do you think they actually need to sell that for to make a profit (also factoring in all R&D, failed chip tapeouts and everything else)? What if they make profit on every unit sold for over $100-200 or something retardedly low?
Yea, they lost their shirts on Bcash, but if their cost of production for these stupid ASICs is something miniscule, it seems like it would be hard to go bankrupt. I also believe a lot of their company budget is spent attempting to try and rig the bitcoin price upwards, and they probably do experience some losses doing that, so that also factors in.
This article is old, but Jimmy Song estimated that it cost Bitmain $500 per unit to manufacture an S9 and the R&D cost was about 10M.
https://medium.com/@jimmysong/just-how-profitable-is-bitmain-a9df82c761a
The development of the 7nm chip was more problematic for them, so probably cost them more in R&D and failed chip tapeouts. Also, the Trump tariffs are adding 25% to the cost of Bitmain ASICS for US customers. This is likely to give any potential US customers some pause before purchasing.