[CoinNess.com Market Surveillance June 13: BTC Trades Around $8100]As of 11:00 (UTC) on June 13, the global index of Bitcoin (BTC) price swings around $8,100, marking $8,100.04. It has registered an increase of 1.31% in the past 24 hours. 
The CoinNess.com Bullish vs. Bearish Indicator shows our four-hour technical bias on BTC is "Buy" with four indicators sending out a selling signal, five showing a neutral signal, and nine indicating a buying signal. 
The broad market shows an uptrend, with 71 out of Top 100 cryptos by market cap rising. 
The global market cap reads $261.08 billion, and the 24-hour trading volume is $64.50 billion. 
Major Coins 
1. BTC quotes show 8,051.89 USDT on Binance, $8,101 on Bitfinex and $8,094.93 on Coinbase Pro; 
2. CoinNess.com Market Index presents quotes for major cryptocurrencies besides BTC as following:
ETH marks $257.51 (+3.50%);
XRP marks $0.400 (+1.25%);  
LTC marks $134.60 (-2.75%);
BCH marks $400.28 (+2.69%);
EOS marks $6.49 (+2.60%);
ETC marks $8.52 (+3.48%). 

1. Patrick Dai, founder of Qtum, announced via Twitter that Qtum has more than 5,300 full nodes in more than 70 countries.  
"I think Qtum full nodes amount only after Bitcoin and Ethereum. it's the biggest POS smart contract network if you count the full nodes number," he said.                                                                                                                              

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2. Nevada Gov. Steve Sisolak has signed three bills centered on blockchain technology into law. The governor signed Senate Bills 162, 163, and 164, all sponsored by Sen. Ben Kieckhefer, R-Reno, on June 7. A fourth blockchain-focused bill, SB 161, has been sent to the governor's desk for his signature, which as of June 12 had yet to be signed. The bills approved on June 7 will help continue Nevada's position as a national leader in legislation supporting the development of blockchain technology, according to Northern Nevada-based blockchain company Blockchains, LLC.

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According to the report released by a local news outlet in China, the police station in Haerken district, Tsitsihar, China, recently cracked a case of stealing electricity to mine Bitcoin. A man laid a cable through a fish pond to steal the power from oil well, so as to mining Bitcoin. The police adopted the drone to conduct an airborne investigation, and finally obtained the evidence. It's reported that 20 Bitcoin mining machines were mining Bitcoin at the moment.

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Question: 

 What are Colored Coins?

Answer: