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NVDA says about 9 pct or $289 mln of its overall $3.2 bln revenue in Q1 came from graphics chips used to mine cryptocurrencies
Analysts expressed concerns over NVDA's reliance on cryptocurrency
Bitcoin, the king of cryptocurrencies, has nearly halved in value from its highest price ever of $19,666 on Dec 17; trading has also nearly halved from Dec, crypto analyst website CryptoCompare says
Earlier this week, billionaire investor Warren Buffett said cryptocurrencies will come to 'bad endings' as they are not backed by assets and are traded on the hope that someone else will pay more for it.