The half of your funds buy some potential altcoin then the other half take it as a capital for your day trading. I think that is the best way on how for you to have more bitcoin. By diversifying your asset it can make you more secure than putting your asset on a single coin or investment.
I agree, and clearly you're good at picking the right coins so you should take advantage of that. Don't risk too much on any single offering, but continue selecting the coins that you think are the best.
You can also start drawing up plans for one of your own. That will take a lot more time and effort than it seems, so you might want to keep going with the altcoins while you get things in order. That way you can balance yourself between the income that you know you can get, and the income that you will earn with a big project in the future.