Is it even possible to lotto mine BTC on something like a newpac USB miner?
In the first place, based on my knowledge mining Bitcoin using a USB miner such as the new PAC is a nonprofit mate.
Why? It is because mining bitcoin difficulty is very high so that it can generate enough hash power to solve the block and gain a reward.
Aside from that, even though you can mine a block, obviously the rewards will not be enough to cover the electricity cost
that could be used by the miner. So in the end, it is still better to buy bitcoin than to mine using a USB miner.
what other SHA-256 (that the newpac would be able to mine) would be worth lotto mining?
SHA-256 cryptocurrency would only be profitable to mine if you use a USB miner such as the Newpac.
Moreover, the difficulty mining of these coins increases. Then in the long run, it becomes hard for the small miner like a USB
device to find a block and gain a reward.
However, other SHA256 coins are still being mined with a low difficulty such as Bitcoin cash, Peercoin, and Namecoin, etc. But these coins would not be profitable to mine using a USB miner. So, I highly recommend joining a mining pool for these coins.