even everyone will do different things,

currently not too many prominent altcoin. even the market tends to be red and almost average all crypto prices fall by more than half the value of its assets. yes, due to the correction in 2017 and the accident a few months ago.

Other competitors such as NEO, EOS, Waves, and IOST have very promising features and technology too. However, it is up to question whenever they will become successful in the mainstream world or not. AFAIK, EOS and Cardano have better chances of rivaling Ethereum than other platforms due to their dedicated development teams and strong foundation. NEO, on the other hand, is good but backed by China which poses a risk for centralization and manipulation. EOS is partly centralized, although it could change over time as it improves every step of the way.

it seems to me that NEO was good at short-term investment and long-term investment is not suitable for it

I totally agree, I'm never think Ethereum wil be scam, I believe this is will be life/legit forever.

SpeedCash (SCS) because of low supply 470000 and fast payment

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