If it's a scam it's very well planned scam I've ever seen in crypto.
![Grin](https://bitcointalk.org/Smileys/default/grin.gif)
Seeing latest events it looks like planning isn't their strongest skill.
Let's recap:
1) release untested feature
2) crash their own market
3) halt and reverse trades
4) bail from the conference
Looking at the XPY price chart it seems like it's going in the opposite direction from the $20.
in that case may be it's not a scam. Can't blame them for failing at something that has never been done before. At least they're dedicated to make it work. Price of XPY returned to normal very quickly after that crash and only few people could take advantage of it because it happened too fast.
May be he chew more than he could swallow but overall I don't think it's going in other direction. Look at the price chart from day 1..no major change except normal p&d that happens to every crypto. Most other crypto can't even survive more than a week after they reach highest volume. XPY has had top volume in all major exchange since day 1 even after price crashed and people dumped.
When BTC was crashing..XPY was one of the coin that didn't get affected at all.