what are the sources of information for purchase and sale of coin by institutions? I feel sometimes this source of information are influenced to deceive traders of accumulation, we saw a lot of them in recent day of the dump and while finding the bottom of the market. Most of the purchases are on the counter not exchanges, so how do people know this accumulation?
I don't think otc data would help that much as anything that happens on the otc market will affect the normal exchanges too.
It's possible to buy data on otc markets though and may companies might factor it into their main currency data pulls (for example, coinbase pro, coinbase and coinbase prime might be aggregated together in one data pull).