No. I Don't Think Cryptocurrency Will Make Real Money Disappear. Maybe In The Future , In Next 100 Years But It Is Not Going To Happen Very Soon. Just Think That Real Money Are Used Since Year 500. Every Single Person Use Money Every Second/minute/hours Etc. It Is Going To Be Impossible To Make Real Money Disappear In A Few Years. Also A Lot Of People Don't Even Know What Is That GOOGLE. How Do You Expect Them To Use Something That They Never Heard About. I Do Think Real Money Can Be Replaced But Not Very Soon.