Have you seen this? After five rounds of JST buybacks and burns, a total of 1.881 billion tokens have been burned.
On the optimistic side, this is supportive of the sector, but a single news item can't keep things going for long.
Official announcements are nothing unusual; what matters is whether they actually follow through.
There's no harm in waiting a bit. Do you usually pay attention to news like this?
Leave the $JST lots as they are for now. Bear your own losses, and think it through before placing an order.