Afterpay is experiencing eye-watering growth, and has had incredible early success in US. It's move into the UK also holds great potential.
The business has a solid first mover advantage, and enjoys very potent network effects and a great positive feedback loop (more users = more retailers = more users etc etc).
Growth drivers are more users, in more geographies using APT for more services/products. They also have solid pricing power, with retailer commisisons seemingly increasing in recent times.
It is a genuine win-win. Consumers get a zero interest cost payment method, retailers increase sales.
Regulatory risks seem overblown -- there's a lot worse business models out there, and any increased regulation likely to be more negative to competitors (that tend to charge interest).
Credit risk is very real, although small transaction sizes, with debt capped and further transactions suspended seems to mitigate this to some extent. They also seem to show some lending discipline, with 30% of transactions rejected.
We are yet to see how things hold up during a material economic slowdown. A decline in consumer activity and increased defaults could cause a significant drop in earnings (or, should i say, a widening in the loss).
Valuations seem crazy, but typical metrics dont tend to work well for companies experiencing exponential growth and that have a long runway for exapnsion (eg Amazon).
And that's the key point -- to be bullish at current levels ($26 at time of writing), you really do need to see APT become one of the dominat global players in the buy-now, pay-later space.
Even then, this story will take many years to play out, and it will be a volatile ride.
If growth stalls for any reason, the market re-rate will be brutal.