If this has happened it may have more effect on btc price rise than the impending halving....
it would have already because of insider-trading. i don´t think it is happening anytime soon.
There is already a Bitcoin ETF....'GBTC' is the symbol. Other than that, I don't know much about it, except that is a low volume scammy p.o.s, that for some inexplicable reason, trades at massive premiums to the actual Bitcoins which are supposed to be backing it...