Those opportunities come during bear markets, and if they do come during your lifetime, be absolutely sure to use a LARGE of your savings, then purchase as much as you can afford during the succeeding months.
Bear market is very helpful and wanted time for experienced investors because they know that bearish months will give them a lot of time for building up their investment portfolio more and they will have good cheaper prices for accumulation too.
With new investors, they will be mostly affected by bear market and most of them are not ready to face with their first bear market and struggle to keep calm and do their Bitcoin accumulation during bearish months.
But during the current phase of the cycle, just DCA with a small amount. The size of the investment won't bother you completely and make you emotional/panic sell.
DCA is a very good strategy for long term accumulation and not only for small investors with small capital, though it is very helpful for accumulating bitcoin with small amount over time. If you are an investor with small investment capital, DCA strategy can help you collecting more sats with time without pressure for selling your house for bitcoin, for example.
Investing in bear market is good but could also expose someone to using up their back up funds or emergency funds. It is good to go a little further on bear market but it is not advisable to go extreme during the Bear market in order not to see off your bitcoin due to emergency situation. Get very used to not investing beyond your discretionary income no matter the market behaviour. Bear market will always come any other time. So ensure you don't sell off soon because of Bear market.