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RE: USD Scam Coin Surpasses $20 Trillion in Debt, but You're Supposed to Fear Cryptocurrency
No real concerns because, as we've already seen this year, if BTC doesn't provide value in a competing currency market, others will rise up to do so.
Maybe the cryptocurrency world will shift to STEEM and SBD where they can do 10's of thousands of transactions a second with 3 second block times and zero transaction fees. I wouldn't mind that one bit. :)