As somebody who knows a thing or two about the market,the one bit of advice i can give to any aspiring players looking to get rich is to be patient with your investments.
Yes,you may see the 50 copies of a card you bought at 500 clints a head and wonder why it's not at 10k,or 20k yet,but as they say, "rome wasn't built in a day",and the reality is that it may take months or even a year or two for a card to really start taking off,as this has been the case with cards like El Gringo
(500 when it was in NB,i recall),Striker
was at 500,Yookie
at 300,and of course,the most known story of all,the well known legend of Alec Cr
being at 400 clints at one point and his meteoric rise into the 20k territory. And there are dozens of cards who have gone like that,and im sure there were players who believed,and their faith paid off.
That said,(and my other point will tie into this here),is,if you aren't committed or patient,dont invest.It may sound like a cruel and blunt thing to tell someone,but if you think that a few weeks is a good gauge of where a card seems is going to be until you quit,investing may not be your thing.