No, and during the case of Bitcoin, it almost in no way was. Unless you had been among the incredibly first people to mine Bitcoin, CPU mining has not been rewarding. The rate will change as the blockchain's average block time development changes as a consequence of network hashrate. https://financefeeds.com/dogecoin-news-doge-whale-transactions-fall-by-70-but-are-soaring-for-this-new-viral-copyright/