What is $ 1.7 billion? This is less than 1% of the total bitcoin capitalization. This is very little to talk about landfill. Whales took advantage of the situation to enhance the effect of such a coin reset. After these coins find their owner, the price will go up again. It's just one person's savings. Lol. Don't panic and everything will be fine.
I think it is more psychological threat. People will be afraid that amount of bitcoin coming to market in short term.