This is the best and the worst.
Luckily,we live in this time,at the moment,how pathetic,
with the development of technogy,we realize the fictitious currency is so powerful to exceed our's expectation.
especially the Bitcoin.At the same time enjoying the success , we also have to bear great risks
No one knows when the risk comes,
Will Bitcoin pass the critical period?
we will see.
Apart from that ,what is your opinion about the challenge?