Lets Compare the Old PTC/GPT with Great Bitcoins;
1. It is hard to earn with PTC/GPT paid in dollars, you need referrals and a lot of strategy and expenses are required for traffic to earn more but with "ptc/gpt bitcoins a lot of free bitcoin are sprouting online with the same intention of being an early adopters grabbing bitcoins before 2140.
2. The earnings on ptc/gpt paid in dollars are already fixed in value not with ptc/gpt bitcoins the earnings though its up and down at this period which is about $600/bitcoin will surely increase in value as more adopters and investors join in.
3. Earning with ptc/gpt also needed referrals but its not primarily a need but will also play a lot in increasing the earnings. There are a lot of ways to earn with bitcoins from "harvesting free bitcoins and mining which can be no cash involve. Trading and investing are other ways in earning bitcoins.
4. Since bitcoin technology is in 5th year as a new invention and more and more becoming popular, gradually all ptc/gpt eventually will be paid in bitcoin and not in dollars.
Start now participating with "bitcoin"try this simple way just to get an early start. Do you want to a complex one visit 5 great classification in eaning with bitcoins