The bid and ask prices are just someone's wishes. They aren't real because they have never been realized. If someone was to purchase or sell at one of those "wishful" prices, then it would be realized and become real....the "current price" or the "latest price".
Just like if I was buying a house. The appraiser values the house 200K you haggle with the seller and buy it at 170K. Then you get hit with a tax bill on your house with the 200K appraisal. The first thing you do is call the city and tell them that the house sold for 170K... the real market value and they usually correct it without any problem and you don't get as ripped off on taxes as you might have gotten. Because 170K is the real value. The house never sold for 200K. The only true market price is the price I paid for the house.
I have a few ridiculous low ball offers for shares on GLBSE all the time, but they are just fantasy. But every once in a while fantasy becomes reality.
However, the bid and asks do have useful and relevant info and are important to pay attention to.