TOR browser is usually used by anonymous people to stay safe by traffic. TOR is usually used for accessing deep web. TOR itself sounds illelegal and has nothing to do here. You cannot just earn BTC and ETH using TOR browser. If you start using deepweb which is totally illelegal then you can earn some perhaps. I would suggest you to stay far from such illelegal thing known deepweb and TOR browser
Tor is synonymous with deep web and the intention is mostly to remain anonymous, so mere mention of using TOR browser here signifies you have some you plan to hide other than that the conventional approach to making BTC or ETH, would have been your good ane enough for you.