Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Operating activities:
Net loss	$ (4,680,200)	$ (9,298,200)
Adjustments to reconcile net loss to net cash used in operating activities:
Share-based compensation for employees		53,000
Share-based compensation for a non-employee	237,700
Gain of digital assets from revenues	(47,800)	(328,600)
Gain from exchange of digital assets	900
Changes in fair value of digital assets	(1,721,900)
Share of equity loss in an equity method investee	75,200
Loss from dissolution of subsidiaries	1,033,100
Depreciation and amortization		111,100
Impairment of intangible assets		888,900
Impairment of digital assets		78,900
Impairment of goodwill		4,688,600
Gain from reversal of accounts and other payables		(1,478,800)
Changes in operating assets and liabilities:
Stable coins		821,000
Prepaid expenses and other current assets	324,400	(116,200)
Taxes receivable	1,095,600	139,600
Accounts payable and accrued expenses	659,900	(1,391,100)
Accrued payroll	(102,500)	(28,600)
Income taxes payable	124,200	4,800
Net cash used in operating activities	(3,001,400)	(5,855,600)
Investing activities:
Purchases of digital assets	(3,146,600)	(46,300)
Purchases of stable coins	(139,900)
Investment in equity investees	(1,546,000)
Proceeds paid to acquire a subsidiary under common control		(10,000)
Acquisition of net assets of a subsidiary		3,800
Net cash used in investing activities	(4,832,500)	(52,500)
Financing activities:
Subscription fee advanced from investors	2,280,100	3,441,000
Proceeds from issuance of common stocks pursuant to private placements	1,420,000	2,350,000
Capital injection from a non-controlling shareholder	88,900
Capital withdrawal by a non-controlling shareholder	(88,900)
Net cash provided by financing activities	3,700,100	5,791,000
Net decrease in cash and cash equivalents	(4,133,800)	(117,100)
Cash, cash equivalents, beginning of year	7,263,600	7,380,700
Cash, cash equivalents, end of year	3,129,800	7,263,600
Supplemental Cash Flow Information
Payment of interest expenses		120,000
Payment of income tax expenses
Non-cash Investing and Financing activities
Subscription fee advanced from investors in the form of USDC	475,000	1,743,000
Proceeds from private placements in the form of USDC		2,050,000
Issuance of common stocks to settle subscription fee advanced from investors	$ 6,604,000