Like every time yes, but keep in mind bullmarket and cheap gpus - not really. Why waiting for the BTC halving? If you want to mine for long time, buy now.
To OP,Exactly this advice.
If you want to be prepared follow this advice and buy cheap GPU-s now,now we are still in a crypto winter market and despite some sort of recovery the price of GPU-s are still low compared to the bull run which they were extremely high.Another limiting factor is the energy price but most cards are efficient and can make you a decent daily amount of crypto for a normal rig with 6 GPU-s and you will be with not a lot of loss (which people fighting for the long run should absorb as there is no other way around this) and hope for the best in the next bull run,that is the best strategy to prepare,you are not late even if you start now.