With such money, it is better to find decent altcoins and invest in them. With the help of altcoins, you can quickly make a profit and improve your skills in investing in the cryptocurrency sphere.
Better find good coin and when it already earned enough to do business better do so especially if you have some skills to do business with. Diversify in crypto and real investments.
Not so quickly. They do give profits but since the market is down right now, it might take some good time for them to recover back and advance profits. But yes diversification does reduce risk and enhance profits.