Yes, you still have few more days! If you'll be buying cards to accumulate more PKM, you might want to wait until March 21st too if you'll be spending $10 and up in a single transaction. This will give you more PKM because of the bonus, that is on top of the additional airdrop if you get to increase your account tier :)
Helpful link: https://pkm.peakmonsters.com/how-to-get-pkm-airdrops/large-purchase-bonus