Probably buy and hold. Not trying to do day trading, just hoping to wake up one day a millionaire overnight kinda thing. Shooting for the stars but why not.
In that case, do not put all the eggs in the same basket, which would mean considering the distribution of your funds in several coins. Apart from BTC, I believe that there are other coins that will survive in the next 3-5 years and bring you a profit, but no one can tell you for sure in which coin to invest - the same as no one can tell you what numbers to pick on a lottery ticket.
As you say, you dream of waking up as a millionaire one day, but to do that you need to buy at least 1 BTC and hope that it will reach $1 million one day - or gamble with some less valuable altcoins worth a few tens of dollars today. Example - ETH in early 2017 less than $10, today over $2000 - BTC at the same time about $1000, today about $55 000.