We only need bitcoin which can purchase all the other things without a problem. The rest are irrelevant and will fade away without much merchant adoption which is what bitcoin has over all those others.
Here are couple of examples: What if I had both BTC and LTC.
1st Example: I want to buy a Lamborghini for $100,000. Would I send BTC that is secure but slower than LTC or send LTC that is less secure but faster than BTC. I don't know about you, but I would send BTC because I would want the $100,000 to be as secure as possible and wouldn't care if it took 15 minutes longer to confirm than LTC.
2nd Example: I want to buy a cup of coffee for $5. Would I send LTC that is faster but less secure or send BTC that is slower but more secure. I don't know about you, but I would send LTC because I want my coffee fast and wouldn't care that it's less secure than BTC.
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Your whole post demonstrates the uses of multiple cryptocurrencies... but you say alts are pointless?
