Bitcoin fever is sweeping the world as the digital currency soared to over $2,200 in U.S. trading on Monday,

The surge in the value of the crypto-currency has been fueled by widening interest in Asia beyond China, with the Japanese emerging as keen buyers after authorities recognized Bitcoin as a legal currency. But the latest volume data shows Americans may be joining in the euphoria: CNBChas the details :

On Monday, bitcoin trade volume in U.S. dollars accounted for more than 32 percent of bitcoin trading, up from 26 percent last Monday, according to CryptoCompare.com. Trade volume in Chinese and Japanese currencies moderated to 16.95 percent and 34.2 percent, the website showed.

Over the weekend, bitcoin topped $2,000 for the first time as trade volume from Japan jumped to 55 percent from 40 percent last week. Analysts also noted bitcoin prices on Chinese exchanges narrowed a recent trading gap with the U.S.-dollar price on expectations that Hong Kong-based Bitfinex is expected to soon restore easy conversion between bitcoin on its exchanges to U.S. dollars.

Japanese authorities increasingly recognize bitcoin as a legal currency.

Chinese internet giant Tencent (700.HK) is also enjoying a rally that has pushed it 45% higher this year. Bloomberg has a great story looking at the growing influence of Tencent on the Hong Kong stock market. The stock has has accounted for a third of the 15% rally in the Hang Seng Index this year. Here's a little taste:

At $335 billion, Tencent is the city's largest company -- and the ninth-biggest in the world. It makes up about 16 percent of the total market value of the Hang Seng Index, which has 50 members including giants China Mobile Ltd. and HSBC Holdings Plc. The index provider, which limits the influence that individual stocks can have on its benchmarks, said last week it will cut Tencent's weighting in the gauge to 10 percent from mid-June.

The U.S. dollar continues to weaken, weighed down by concerns about the Trump White House's ability to deliver on many of the policies that had pushed the greenback higher after the November election. CNBC has taken a closer look at how President Trump has become a negative for the U.S dollar :

If the president is the standard bearer for the currency, Donald Trump himself will have to stop being a negative in order to get the dollar back on its feet.

Boosted by the Trump trade, the dollar had soared after his election on the prospect that lower taxes, fiscal stimulus, and deregulation would boost the U.S. economy. But that trade has reversed, and the dollar index is now down 6.6 percent from its post-election high and down 0.9 percent since the election.

The views and opinions expressed herein are the views and opinions of the author and do not necessarily reflect those of Nasdaq, Inc.

The views and opinions expressed herein are the views and opinions of the author and do not necessarily reflect those of Nasdaq, Inc.