"Neither Russia, nor any other country could have a national cryptocurrency", said Putin at an annual question-and-answer session with Russian citizens.
"But I believe it's a technical issue", he said. The group used to be called G8 before Russia's membership was suspended in 2014 after the outbreak of the Ukrainian crisis.
Trump said on Friday that Russian Federation should have attended a Group of Seven summit in Canada over the weekend, an idea that even Moscow seemed to reject saying it was focused on other formats.
Earlier Sunday, Putin criticized the USA withdrawal from the Iranian nuclear deal in a speech at the summit. Russian Federation had threatened to shoot down any United States missiles fired at the country.
"It should continue to be implemented effectively", Xi said, according to a read-out of the meeting on the Chinese foreign ministry website.
Russian President Vladimir Putin on Sunday said he was ready to meet his USA counterpart Donald Trump as soon as Washington was ready, adding Vienna could be a possible venue for such a summit.
Chef and longtime television personality Anthony Bourdain has died at age 61
New Yorkers who live in the same Upper East Side neighborhood as Bourdain's family reacted with sadness to the news of his death. He had written that his love of food began as a youth while on a family vacation in France , when he ate his first oyster.
Putin said that some nations, including Austria, have offered to host his summit with Trump, should they have one.
In April, the White House confirmed the two leaders spoke in a phone call about meeting at the White House "in the 'not-too-distant-future".
While the 17-year-old Shanghai Cooperation Organization has increasingly extended into trade and economic cooperation - the G-7's central focus - it was founded as a security group.
Trump left the Group of Seven (G-7) nations in turmoil this weekend, China's Xi Jinping and Russia's Vladimir Putin were putting on a very different show on the other side of the world.
They have met in person twice - once at a formal bilateral meeting in Germany and once on the sidelines of a leaders' summit in Vietnam. That is why it was begun by the United States way back when.
The Russian president visited China between Friday and Sunday.
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Putin says "Russia welcomes the planned summit of the US and North Korea and notes China's big contribution to helping settle the crisis on the Korean Peninsula".
Addressing the 18th summit of the Shanghai Cooperation Organization (SCO) on Sunday in Qingdao, China, President Hassan Rouhani described the United States' move to impose its own policies on others as a growing threat, saying "unilateral sanctions damage the process of legal worldwide business". The bloc includes China, Russia along with four ex-Soviet Central Asian nations, as well as India and Pakistan.
Putin said Washington's decision to exit the agreement could "destabilize the situation" in the region.
Xi said the deal is "conducive to safeguarding peace and stability in the Middle East and the global non-proliferation regime, and should continue to be implemented earnestly", according to Xinhua.
However, US President Donald Trump announced on May 8 that Washington was walking away from the nuclear agreement, vowing to reinstate nuclear sanctions on Iran and impose "the highest level" of economic bans on the Islamic Republic.
Trump adviser says Trudeau 'stabbed us in the back' at G7 summit
The calamitous summit ended in disarray after Trump broadsided his allies by disavowing a joint statement the U.S. had agreed to. They didn't tell you that, did they? The actions of Trump have been severely criticised by French President Emmanuel Macron .