Bitcoins are still to be widely accepted as an online currency. This makes Bitcoins not very feasible replacement of conventional currencies. Biggest problem is of Governments of various countries denial to accept Bitcoin as an acceptable mode of business transaction as exchanges and transactions made in Bitcoins remain non track able by government agencies. Security issues are a major disadvantage of Bitcoin, The Bitcoin wallets can be lost if data is corrupted by virus or if hard drive of a computer crashes. Nothing can recover the lost amount of Bitcoins in such incidents. Wealthiest Bitcoin investor can be rendered bankrupt within matter of seconds and the Bitcoins may be lost permanently.
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