As to the price, I guess the crypto market and the stock market more or less mirror each other's Bitcoin price, but you'll probably spend more on fees and commissions when buying on the stock market.
More importantly, not all ETF or ETP open 24/7. That means you could miss timing to buy/sell Bitcoin.
May I ask why buy in stock exchange though??? Why not just buy in a crypto exchange if you really want a centralized authority holding your coin
Because the bitcoin exchanges are all scam artists!
Even ones which legally registered and comply with government regulation?