You're also forget to mention, if you bought ASIC miner it doesn't mean you're always make profit if you mine BTC or Doge. We're currently on bear market and you wouldn't mine that's much if you only have few ASIC miner. While Doge the price only increase when there's a news about Elon Musk (which I don't know why the reason is), if not the price will continue to decrease.