not as much as I question the relevance of your argument.
45k is less than 2e-8% of the population of US (and I probably underestimate the population of the US), but right it is more than 2...

I'm not too familiar with the technique of how to debate with an idiot but here's my attempt
The bitcoin market is a collection of hundreds of thousands of individuals who each contribute small cash amounts to produce this $16.9 million trading volume
The daily trading volume of bitcoin is $16.9 million
No matter how small the % is of the entire population, it is a fact that there are several "people" out there that own a single piece of property that is valued at, or much higher, than $16.9 million. (Be aware that the ownership of property is an investment)
Making bitcoin, as a tradeable asset, not that much of a factor on a global scale (not saying that it wont be in the future - i hope it will be)
Someone can easily invest $16.9million into the stock market, into commodities and into forex without the transaction even being noticed or seen as "a huge investment". But if someone were to put $16.9m into, or take that same amount out of bitcoin there would be pandemonium
Forex has a daily trading volume of $5 Trillion, but is easily manipulated everyday by central banks, government officials etc etc etc
Bitcoin is nothing when compared to the forex market, so for someone to assume that bitcoin isn't manipulated just because it has $16.9m trading volume is quite ridiculous