in my opinion, the best way is to invest right now a third of the capital in ten top altcoins, a third in bitcoin, and the remaining third to be used for purchase in case the market goes even lower.
that's a classic answer, imagine with 1,5k and you just get a small amounts of bitcoin and when you are going to the ethereum and ripple, there is no a lot of volatility that can bring you more benefits. it's much better to deal with a small coin with very huge potential just like credit. It has a chance to go to the moon or just try with another middle tier of altcoins.
I agree that under this investment scheme you will not get the big profit that a high-volatile coin can give, but you will agree that the risk will be the same in this case. However, I do not recommend investing everything in bitcoin, half of the capital invested in top altcoins can give ten times more.
It may be right, but l do agree with your opinion. To buy or to hold can not help you or with this way you can not earn some money right now. As you above said, that is why the volatility, power of market is not enough to do it. Regardless the predictions, we need to keep holding altcoins.