nothign is stopping me. I love using bitcoins 
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))But does not aware of bitcoins, Once bitcoin reaches to all common people It will come and arise to the all category people. Still so many people near my location they dont know what is it. When I explain about that. They didnt believe as well. We should solve these things
I also think the ignorance of bitcoin stops people from using bitcoin. Not many people know about bitcoin or the benefit of bitcoin.