Securities

I have been reading and discovering bitcoins for some time now and reached to the conclusion that mining by yourself only with your own PC is completely pointless and not worthy (yeah I am sure most of you figured this out months ago, so no need of mentioning that).

The only thing that makes sense to me is actually buying some securities. Here arises my question... how to choose a security. I read in the securities section about many interesting and not so interesting investment opportunities. First of all I can not understand how can one be sure that the people who issue the security are real and not lying ? How can one be sure that a person who has let's say 100 Bitcoins does not start kind of Ponzi scheme. If the securities are sold at let's say 0.5 Bitcoins and have return of 0.1 Bitcoins per week so many people will be buying them, that he will be able to fraud the market and pay out dividend only from sales of securities.

I saw that one of the most traded securities is G.ASICMINER-PT, what I am curious about this particular security is what exactly is their pending order for ASIC hardware, actually this is my question regarding all securities. Can I check somewhere what kind of hardware are they currently operating at what GHash rate and what order have they placed with ButterflyLabs. Another extremely important thing seems their position in the waiting list, as obviously people who are just now ordering the hardware will get it so late, that it will not be profitable.

Thank you in advance for the responses and have a successful start of the week!