I respect your opinion, but it's better to buy the coins directly if you´re going to bet, waiting to price rises
If you like some coin, you can mine the most profitable at the moment, and then buy the coin you want directly, this is more profitable
Mining coins when the market is in bearish phase and hope that price will skyrocket is something like the pain in the ass, Nothing more. Don't hope too much that price will skyrocket because in reality price might decrease to zero and you have to pay mining fees monthly.
Unless if you have a lot of rigs, in this case you can point some cards to mine unknown coins
It is a kind of very risky investment, from mining. Mining unknown coins contain more risks than opportunities. So if one miner does not have spare funds (from profits earn from crypto investment), he should not take risks like that. Anyway, your approach is one of good approach for risk-accepted miners.
There was a time that I had 25 GPUs and 4 CPUs mining and I pointed mostly on ETH and Zcash, it was more profitable, but I always put 1 card only to mine unknown coins, you see, only 1 card of my 30, so it's nothing risky, and I mined that coin for 2 weeks, and them I put on a wallet and holded mostly of them
It's an interesting approach, but for rule, it's always best to mine for profits at the moment (excluding people that are engaged to some projects and want's to support the network of that coin)