We might have a repeat of the trends we saw in 2013, and that would indicate this year being status quo until 2019, where it would presumably take a hit again after the hype continues to wear off.
I think your right, 2013 was a 2nd layer adoption year, and 2017 was third, early adoption (2010) was still rare,
The parabolic problem is the real danger point, nothing in human history goes parabolic, without coming back down, ( 2017 btc went parabolic )
There is a real problem with BTC, is that 300+ Billion is capitlized, with no hope of exit, for now its a real nice way to launder and hide wealth for the coming collapse of US-DOLLAR/EMPIRE/GOV, but say the collapse does come and all of a sudden all the HODLER's since 2009 come forward, where r the buyers?
Much of 2017 was an ASIAN trading frenzy, and they're fickle,
The biggest wild-card in my humble opinion will be the inflection point where its common knowledge how to crack ECDSA, then CORE will have to either move fast, or a new-alt will be waiting to take up the flow, but for certain there will be a HUGE exit from BTC
The thing is despite lies and BULLSHIT which is 100% of what BTC is about, the thing is NOT long term secure, NSA doesn't issue public algos where they don't hold the key, they're not going to let this thing stay this way forever, as we go into 10 years, with the same ALGO, and CORE stays conservative, the thing is heading over a cliff
I'm assuming there will be a BTC 3.0, a third party not of core, or ethereum, not Monero, or the z-(coinzionist) family of coin, there must be some new real coin that is secure, and anonymous to become the BTC 3.0, and right now I don't see it out there.
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Smartest thing to do is diversify into solid secure coin that have known good ppl running them, CORE simply can't keep patching the one-trick pony forever, I don't see a valid BTC 2.0, and 1.0 has run its life cycle, we need to jump to BTC 3.0, but it needs to have NO NSA algo's, it needs to be super-secure and unhackable for another 20+ years