LOL unless u have a SHIFT payments Visa card from coinbase linked to ur coinbase account, there so way u can realistically buy groceries using coinbase! they SUCK
u need a BIT PAY debit card and use BitPay btc wallet! fuckin visa debit card takes bitcoin right from the bitcoin wallet! (u send it however much u wanna spend, 1 confirmation later u have money on a visa card) the card is $10 so just buy one now so ull have it whenever u need it! i fuckinsent $4 in btc an bought some french fries at jackin the box (fast food) and it worked perfectly so its all u need! no fees either! i dunno how they even do it! i didnt have to even pay a 2 percent fee like coinbase! i guess they make money of the regular visa fee like the few cents per transaction ....

anyway fuck coinbase man use bitpay! maybe use coinbase to buy bitcoins but EVER use them to sell or convert to fiat! bitpay man! just buy the car its $10 one time fee u pay in bitcoins have it sent to ur house!

OR use the GYFT app IT LETS U BUY GROCERY STORE gift cards like WHole foods Trader joes, cvs anything with BTC! u can buy a starbucks GYFt card with bitcoin instantly and go use it and scans from your phone! i dont get why people say u cant use bitcoins to buy coffee at starbucks! u can even use that card to get CASH fro bitcoins using cvs or starbucks! any $10 card with money left on it by law they have to give u the remaining cash on it...so u can use gyft app to convert bitcoin into cash wenu buy a $10 gyft card and buy a 33 cent candy or gum with it, , u make cvs or starbucks buy back your bitcoins for cash,