If you have indeed quit your job and put "all your savings" into those two stocks, you have no money left to invest in other ones. Day trading is a hard way to make a living- many try but few are actually very successful at it. Buy and hold is better because the more you trade, the more you lower your returns (each trade costs money- not just in transactions costs but in short term capital gains taxes as well).
You also need diversity- not just one or two stocks- to spread risk. I like index funds for their diversity and very low costs. There are many different funds tracking many different indexes. And since they aren't chasing returns by trading for what they think will be hot in the next quarter but just matching the stocks in the index, they aren't trading shares within the fund and that keeps costs lower which means more money for you.
For individual stocks, check into what a DRIP is- (Dividend Re_Investment Plans). It is the lowest cost way to own individual stocks (each have their own rules on things like minimum purchases and investment requirements). Basically you buy a dividend paying stock and they take the dividend payout and instead of sending you a taxable check, they roll the money over into more shares of the stock (usually at zero transaction fee). I added $5,000 to my account recently and was charged $0.18 (yes, eighteen cents) transaction costs. Buying shares at say ETrade may cost $7 a pop.