We know that since the advent of Bitcoin, the value of Bitcoin has increased greatly, but there have been deep declines.
if you look at the whole price chart you can see that there were "over excited" phases but if you ignore the over-excited state you can clearly see price has only been rising.
In addition to market factors, Hardfork times also make Bitcoin weak.
no it does not.
So if Bitcoin doesn't have Hardfork, what is its real value?
the only hard fork that bitcoin has ever had was from many years ago and price wasn't affected that much