Cryptocurrency and its future

This question is considering all cryptocurrencies, not excluding any or focusing on any specific crypto blockchain/asset/tech..

Many of us are investing in a specific crypto because we believe in its technology and how it can change the way we deal with financial establishment. Many of us are investing in different cryptos in hope to become millionaires with lambos and yatch’s… what I am curious is, when will true international adoption come into play? Specifically, when will we be able to make transactions using our cryptocurrency in the same manner that we use our debit or credit cards? I believe the ultimate goal is to eventually use our investments just as easily as we use our debit cards. Are we close? 1-5years? 5-10years? Is this just an arbitrary number that will fluctuate depending on global politics? Please share your thoughts, opinions, etc.