Volatility is perhaps the most commonly-cited disadvantage of Bitcoin in terms of its use case as cash. Ironically, that very volatility helped grow the network, providing traders with very lucrative opportunities in short time periods. However, for those wishing to store value and transact Bitcoin as an everyday currency, the volatility is a major drawback.
Theft isn’t the only way to part with your Bitcoin. There are frequent reports of people losing the keys to their wallet, and again, this is much like losing cash - there is no way to recover the funds without the keys. It’s estimated that approximately 20% of all existing Bitcoin has been permanently lost. However, given that Bitcoin is a finite resource, some argue that this simply increases the scarcity and theoretical value for other investors.
Coinbase has two core products: a Global Digital Asset Exchange (GDAX) for trading a variety of digital assets on its professional asset trading platform, and a user-facing retail broker of Bitcoin, Bitcoin Cash, Ether, Ethereum Classic, and Litecoin for fiat currency. It also offers an API for developers and merchants to build applications and accept payments in both digital currencies. As of 2018, the company offered buy/sell trading functionality in 32 countries, while the cryptocurrency wallet was available in 190 countries worldwide. On March 26, 2018, Coinbase announced their intention to add support for ERC-20 tokens.
Yes. Bitcoin has not been made illegal in any country to date, although some nations restrict its use more heavily than others. Bitcoin is often associated with crime, because it can be used to make criminal transactions. However, this is true of any currency. Bitcoin is harder for authorities to trace than digital fiat transfers, but easier to trace than cash, and most criminal transactions in the world are made with fiat, not Bitcoin.
In February 2019, Coinbase announced that it had acquired "blockchain intelligence platform" Neutrino, an Italy-based startup, for an undisclosed price. The acquisition raised concern among some Coinbase users based on Neutrino founders' connection to the Hacking Team, which has been accused of providing internet surveillance technology to governments with poor human rights records. On March 4, 2019, Coinbase CEO Brian Armstrong said his company "did not properly evaluate" the deal from a due diligence perspective and thus any Neutrino staff who previously worked at Hacking Team "will transition out of Coinbase."
The other 2% of customer funds, held online, are covered in the event of a breach of Coinbase's online storage. Also, Coinbase holds all customer fiat currency in custodial bank accounts, on behalf of customers. So, if you have fiat currency in Coinbase, in a USD wallet, it is covered by FDIC insurance up to $250,000 (just like a "regular" bank). This protects customer assets (so long as they have been converted to fiat currency) even in the event of Coinbase becoming insolvent.