Stablecoin payment cards just hit $600M+ monthly volume — 3x growth in 12 months

The numbers:

- $6.5B cumulative volume processed

- 21.4M total transactions

- Visa handles 95%+ of crypto card rails ($7B annualized run rate)

KAST is eating this wave:

- 1M+ users

- ~$5B annual volume

- 15-20% MoM growth

- Up to 6% cashback

Stablecoin rails are no longer experimental — they're scaling into real commerce infrastructure. If you're not watching payment volume as a proxy for crypto adoption, you're missing the signal.