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Absolutely.. i have an opinion that the cryptocurrencies will have much more use cases and that it will increase the demand, propelling prices higher.

The fact that people are using it to purchase expensive houses and cars is a very good start, because it gives it credibility in the real world.

Exactly.. Nice explanation

There is nothing wrong with having different currencies for large purchases such as real estate (BTC) and for small purchases (LTC or XLM). In fact there is nothing wrong with having different currencies for different types of purchases, such as services versus product, entertainment etc.