I have btc but never had to buy bitcoins. I get bitcoins because i play poker at certain sites that allow you to cashout in bitcoin. Thus if i deposit another method, they allow me to withdraw bitcoin.
But if i wanted to buy a lot of bitcoin... say at least 20 bitcoin... what would be the best method? Coinbase and circle the limits are very small right where you have to wait at least 1 month? Even if so, you could only buy 3k max worth of bitcoin? I also wouldn't want to pay a premium for bitcoin and want to buy bitcoin at the current price.
What about those that want $10000+ worth of bitcoin and more and don't want to pay premium fees?
I think you want to trade bitcoin ? right ?
if yes you can buy 1/4 in rate now, 1/4 at -3% from now, 1/4 -6% from now and 1/4 -10% at now
that best method to trading

(for me)