Everybody is talking about ETFs, but I don't believe that they will be the fuel for the next price rise. As Bitcoin moves further towards being a store of wealth, and merchant adoption increases as secondary services like the lightning network stabilise, they seem more likely to trigger the increase in value. The price of Bitcoin seems to be cyclic, and to add a zero to the price every two years. I think we have missed the chance in the current cycle, but the one due in the summer of next year looks to be on target. Will the current enhancements arrive in time to fuel the next parabolic price increase?
Yes, I believe that the last years rally was fueled by SegWit and Lightning, investors saw that Bitcoin is not stale and outdated and actually makes real and solid progress, unlike altcoins. So, any further improvements will also boost the price, plus we'll have a new halvening soon, so a new parabolic rally is very likely, although I don't expect it to be as big as the previous one (x20), the new ATH will probably be 50-60k.