Based on the concept of sustainable development of any nation Cryptocurrency is becoming a vital instrument for transactions,investment,Income and giving job opportunities to many even in time of pandemic. crypto currency is a big breakthrough to man and environmentally friendly.
Based on what are you saying that crypto is "becoming a vital instrument for transactions,investment,income" ? There's no data that shows that crypto is playing any notable role in economy. If it all disappeared tomorrow, most people wouldn't even feel it. They'd only read about it in news, and that's it.
And as for enviromental friendliness, this is questionable. PoW, which is the only way to actually have a decentralized cryptocurrency suitable for global needs, is notoriously power intensive. So, there isn't any big improvement here over traditional financial infrastructure.