is usb mining still worth it?, how about its ROI?
Most of ASICs u can buy will never ROI, since the mining companys are probably mining with the hardware they are selling for some time before releasing it to customers, even when they state that they dont.
Bitcoin/altcoin mining was way better before asics came out to scene if you ask me, since then, theres nothing but bad profits, and dont forget that an ASIC that cant make up even for electricity is totaly useless afterwards, unlike the GPU-s that were previously used.