Hahah, these posts are hilarious. "This is investing 101." LOL. Here is actual investing 101: buy low, sell high. That is investing 101. Collect dividends which are based on profits. That is also investing 101. That's how investors make money. What sort of thing do amatuer investors need to avoid? Don't invest in a company just because it's big. That's dumb. If you make money just investing in big companies then it has more to do with luck than skill. That is the third lesson of investing 101.
There. You just got schooled. Now all you have to do is follow that advice and you won't lose your shirt. It couldn't hurt you to look at some of Warren Buffet's advice either. Basically he says to avoid short term speculation and invest in companies which will be profitable in the long term. That's what makes stock value increase in the long term (i.e. over the course of several years.)
You also seem to have no clue how Netflix got started. It didn't start out as a streaming company. It started out renting movies through the mail. Amazon also started out just selling books only online. They started out as small businesses with high profit margins. That's how they became so successful today. High profit margins matter to investors. Size? Who cares. It makes the company look impressive, but it doesn't help investors. And in the long run the profitable businesses end up growing anyway.
Firstly, you're not readin what I wrote at all or misconstruing it. I never said invest in big companies, rather those with dominating marketshare or signs of it, as they lead to the biggest players.
Buy low, sell high is such shallow advice that's its something akin to what a 12 year old would say. This is below even amateur investing.
Yes I know how they both started. Again, learn to read. Amazon and Netflix did not become top SP stocks by continuing their original business. They entered or pioneered completely new sectors, and financed this venture and growth with aggressive debt and thin margins.