We can invest with Bitcoin in many ways one of them with trading but trading Bitcoin need skill and experience if you do not have both of them then you will only be a waste of money so you can figure out how to trade via Bitcoin talk or Google .
Yes google is one of the way to know how to trade properly but not all the important things that we can know in trading are there. It's always better to ask those trading experts and get some proper signals from them. And while you are trading, you can also do some buying and selling of digital goods or you can use your Paypal funds for selling too which are good in investments of bitcoin.
Yes we can invest our bitcoin in different ways like investing in trading but yes you need also a skills and more experience before doing it. In trading you need also a lot of research before doing trading . because most the trader did not make a research so the result is failed. And others make a research so the result is successful . follow the tips of the expert and successful trader and do some strategy. Yes buying and selling is also good to make bitcoin/money.,