don't do that, whenever you buy any cryptocurrency keep an eye on it, your money is needed and for that reason it also deserves the same attention you give to school and other things
What if you had lost 50% of your investment? this could also have happened, so don't think too much about it, you couldn't have known
That is very right, you wouldn't know what will happen to their market. Just lucky that ADA is in good position because it is really a promising network. But if it has been a different alt, it may go down without you knowing their market movement. So lesson learned also, if you are a holder of any coin, make sure that you are diligently keeping up their updates so you will not be left behind. Because most alts, they died easily and you have no way of recovering your investments if it happens.