Talking about byproduct problems forsecure my blockchain, I unsuccessfully here, because I only mine bitcoin from the steemit application. Not many coins that I can produce because my SP is still too low plus I don't have much relationship in Steem. maybe if I have a lot of capital I will buy ETH, EOS and TRX. I am interested in the coin. I think the coin-coin is suitable for securing the main coin, bitcoin.