Shiba Inu price has returned to 2021 before the new all time high is reached,
of course this is a good opportunity if you want to buy Shib and accumulate it from now on,
because this zone is the same accumulation zone as 2021, so don't wait, buy and hold is a wise choice.
Buying shiba inu at this point is good enough but not so good also since there is high risk possibility that the price and market may not fully react the same way as 2021 as you mentioned and also as a meme coin, I won't take shiba for long term base but short-term speculations yes but not for the long term as the case may be, Shiba inu have pumped a lot in the past and the possibility of it making that same price attempt is again in doubt even though we may have some possibility for that to happen anyways.
But regardless, altcoin investment is based on luck because no one knows the next coin to pump so you can take the risk base on the percentage you are ready to risk on.