Except that RIOT has nothing to do with Blockchain technology. In fact there are two Blockchain ETFs that just launched that provide exposure to the BC technology. BLOK and BLCN.
Check out the holdings as a primer on how to play the space. You will note neither has this junk in the ETF holdings.
Security Description BOC Hong Kong Holdings Ltd Digital Garage Inc Hitachi Ltd NEC Corp Fujitsu Ltd Panasonic Corp Tencent Holdings Ltd ZTE Corp SBI Holdings Inc/Japan NTT Data Corp Accenture PLC Airbus SE Advanced Micro Devices Inc Amazon.com Inc Atos SE American Express Co Alibaba Group Holding Ltd Bank of America Corp Banco Bilbao Vizcaya Argentari Barclays PLC Broadridge Financial Solutions Citigroup Inc CME Group Inc Credit Suisse Group AG Cisco Systems Inc Daimler AG Deutsche Boerse AG Fidelity National Information GFT Technologies SE Goldman Sachs Group Inc/The Hive Blockchain Technologies L International Business Machine ICICI Bank Ltd Infosys Ltd ING Groep NV Intel Corp Intuit Inc JD.com Inc Mastercard Inc Microsoft Corp Nasdaq Inc NetEase Inc NVIDIA Corp Oracle Corp Overstock.com Inc Banco Santander SA SAP SE Siemens AG Samsung Electronics Co Ltd State Street Corp Toronto-Dominion Bank/The Thomson Reuters Corp Taiwan Semiconductor Manufactu Texas Instruments Inc UBS Group AG Visa Inc Worldline SA/France TMX Group Ltd