So recently the market has lost 30-50B in market cap , So i'm assuming that institutions are buying BTC and then dumping it on the market whilst shorting it. If they made a bunch of Fiat Backed Crypto currencies (Through "QE") , Couldn't they just buy up the tokens , Long the price and then Sell the tokens and short it down again? Is that what is happening in the market right now?
Is there a better metric than Market Cap or is this the only metric that is used to measure the actual value of BTC ?
Correct, huge influx of money from institutions could change the market cap if they trade on exchanges, buy so much bitcoin then dump it next week, the price will change significantly, however, the price may differ on other exchanges as the transactions only occur on one exchange, it happens a lot.
I wouldn't really care about market capitalization metric to measure the actual value of bitcoin, simply judge it by the supply and demand on the market, just check it on exchanges.