Yes, sub $10k BTC is the time to buy I think we have a few more months to get there, perhaps end of 22 early 23.
IMHO Doge is still sky high at 10 cents, or even 5 cents, better to wait until closer to 1 cent or even under.
And to the OP, just because you have mining rigs does not mean you need to use them. As a long time miner I have in previous bear markers shut down my rigs and just bought coins directly with the money I would have sent off to my power company. If the cost of mining coins is more than you can pay for them directly, do not feel you *must* mine.
I always said that btc will find its bottom around september 2022 to march 2023, right now btc is still overpriced. As it goes altcoins and everything will keep crashing, people need money to pay bills or buy things, so they will keep selling, selling pressure is very high on bear market, but remember this is not bear market yet, this is pre bear market. The worse has yet to come.