prices will fall because they are sold in large quantities, and when that happens, all analyzes will not be accurate and will deviate.
in fact, it provides advantages and disadvantages, depending on how everyone responds to current market conditions.
There has been always some confusion about the understanding of how market deciding the value of a commodity; even supply and demand are playing big role in deciding price level of a commodity, the circulating supply (so far mined bitcoins for the case of what we discussing here) is the actual thing we need to consider because total supply is just the number as it is practically not possible to how all the supply to be available for trading against the demand.
So, coinmarketcap and total supply are just number which has nothing to do with current price level for bitcoins. If a whale will be deciding to bump all their stash then bitcoin market will definitely face a huge downfall of price levels. This applies for all trade-able things not just limited to bitcoins.