There are always threads on the forum referencing the following
This is the best year to join crypto currency
This is the best time to invest blah blah
There is no year that crypto currency won't make pple smile (profits) and cry (losses), simply because crypto currency cannot make everyone happy at the same time.
For the best time and best opinion I can provide, it is the matter of decision that will determine whether a person will going to be happy or not, depending on the choices that they will put they mind into, it is not always the investment on the low and the let go on the high that matters, it is the contentment of a trader that will make him happy on his decision.