His aim is to sell on the way down and buy on the way up!
No, the traders aim is to buy on the way down and sell on the way up.
If the recent decline is down to the traders then The exchanges will be Flush with FIAT just waiting to buy in when the recovery begins.
Implying that the trader's goal is to have more BTC. I believe this was the majority in the past, as of current, I think the more active traders are looking for gains in $. Consequently they're taking $ out of the BTC economy, not keeping $ in it by taking BTC off the table.
Let me remind you that it was only 2 weeks ago 33,000 was dumped onto the market early sunday morning and it was all bought within 5 hours which initiated the $380 (peak $417) rally.
Only 8000 were dumped, the remainder was a market order and we don't know if the market maker was also the market taker.
So, unless you are desperate to cash out today then WELCOME the traders with open arms because it is all their activity, and their cash, which will initiate the FAST price increase when the market turns and they are desperate to jump on board as the price rises!
In an ideal world. However, the reality is is that it's far from ideal.