Here is a simple chart of Bitcoin now with Relative Strength Index(RSI) indicator.
Why I said Bitcoin got more room upside? Because if we compare the previous RSI value when we reach the all time high, RSI value reached around 90.
Current RSI now, we are still not in 90 value of RSI, so for me I am expecting if we we surpass the previous all-time-high we may still not touch the 90 value of RSI.

What are your thoughts? Can history repeat itself? Like reach the previous ATH with same value of RSI?