Table 10.

Future research questions.

Sl. No	References	Research Questions/Explanations
1	Authors' suggestion	Does the correlation between Bitcoin return volatility and socially responsible indices have any possible utility for stock investors in terms of portfolio diversification? What will be the major discoveries if various aspects, including macroeconomic variables and fundamental factors are considered?
2	(Tiwari et al., 2019)	What significance does cryptocurrency have in hedging against other financial assets like bonds, currency, and uncertainty?
3	(Jiang et al., 2021)	How do different cryptocurrencies role the stock markets? Does “Bitcoin Futures” as an added derivative impact the role of cryptocurrencies?
4	(Omane-Adjepong et al., 2021)	Do internal and/or external factors influence the herding behavior between cryptocurrency and emerging markets?
5	(Zhang et al., 2021)	Will assessing the risk spillover between Bitcoin and disaggregated stock indexes provide any significant outcome? What if Ethereum and Ripple are utilized combining with Bitcoin to better reflect the global cryptocurrency markets? Would the results be any different?
6	Authors' suggestion	What are the impacts of cryptocurrencies other than Bitcoin on the stock market?
7	(López-Cabarcos et al., 2021)	Is it possible that Bitcoin and investor sentiment have a bidirectional connection? Does analyzing the correlation between Bitcoin and other financial factors such as, currencies & indices convey any significant ideas for future investors?