Wow I just noticed that sale. I did some digging through the block explorer.
First glance": if you can believe the "experimental" guesstimated wallets feature, then
that amount hasn't left Bleutrade's wallets (unless it was through multiple transactions in smaller amounts) as no similarly large addresses have been active in a long, long time. None of the non-Bleutrade, non-pool top 100 addresses have changed recently enough to be involved in a gain of that size, and somebody withdrawing probably wouldn't bother automating multiple small withdrawals just to stay off the top 100 addresses list.
https://chainz.cryptoid.info/trl/#!wallets
The reason I tweeted about it with the hashtag #wash is because that 350 mil wasn't sitting on the offer for very long. When it was placed it cleared out a small bid at 3 sats, then a commensurate buy was issued 5 seconds later to clear it out, confirmed by the subsequent buy at ask 59 seconds later at 4 satoshi. (Of course any remaining amounts on the order book could have been pulled/canceled during that time too.)
Classic definition of a wash trade where two parties colluded to create the transaction, or just as likely, one party using two Bleutrade accounts. Considering the size of the single transaction it must have been an early miner of TRL whose coins were sitting on Bleutrade for over a year, playing with some BTC in order to get a rise out of people watching.
One interesting thing to check and compare would be the records of CryptoRush's TRL balance, since I know they were the first exchange to list TRL around the time of 50000-coin block rewards.
EDIT: I checked Bleutrade's other pairs just in case this was part of some crazy-ass arbitrage but nowhere near the volume needed was going off. I did discover that at current DOGE prices there has been a pretty big bid to buy TRL at 0.05 DOGE each (3.4 sats). So if you can buy TRL at 3 sats anywhere, you can arb to DOGE.