Well this is a very interesting question, there are lot of suggestion which you would have received.
Network Marketing - There are many network marketing business which exists and they are also profitable, in network marketing business you will have to spend a lot of time to grow your chain, or tree which is the base of earning profits in them. My land lady is a diamond in oriflame business, and she devotes a significant amount of time in growing her business, doing marketing and sales which are targets in some or other form in network marketing business. So say you have to invest a 1000$ and you start this business, you will get returns but you will also have to dedicatedly invest time into it.
BitCoin Investment - For sure
bitcoin investment is subject to market risk, as of 2019, the bitcoin is trading at 10,000$ and it is been expected the price will rise because of the various reasons bitcoin is associated with. If you put 1000$ in it today and the price say rise to 3x in next two years, then you will have 3000$.
So investing 1000$ in network marketing may give you regular income, and a way to lead a better life, if you invest 1000$ in bitcoin then your investment will be locked for a lot of time and you may not get the same returns.