For retail investors in a situation like this, it probably doesn’t matter. You would create a buy limit order at a price somewhere high enough that it’s likely

For retail investors in a situation like this, it probably doesn’t matter. You would create a buy limit order at a price somewhere high enough that it’s likely to execute no matter what the price is doing, so the effect is basically the same as a market order. The advice to generally use limit orders is good though. Rarely would a retail investor need a market order.