Is it possible that bitcoin will be obsolete in the future?
Satoshi is likely dead. Bitcoin goes forward based on consensus, contribution and building on foundational principles that began through the whitepaper and Satoshi's initial direction.
Value and price might be two things, but it does seem that incentives are aligned in such a way that price and value continue to have decent correlation, so as long as the bitcoin network continues to create and attract value, likely price will continue to rise, and accordingly if price is rising, it wouldn't become obsolete.
Another question would be whether some other coin(s) might take some value and in the short term, we may witness some of these kinds of dynamics, but so long as bitcoin does not become broken, it seems likely that value is going to continue to migrate in the direction of bitcoin which remains the soundest of any of the cryptos and certainly more sound than fiat and even precious metals such as gold/silver.