Bitcoin has value because miners have to buy equipments, pay for energy to mine it.
Bitcoin supply is limited at 21M, people invest in Bitcoin because it has many features that fiat don't has and they hope the price woud increase.
well enough reason to say that Bitcoin really has a value mate,but remember that since this market is volatile the possibilities that price may fall is always there but also chance of going high is there because the 21 million bitcoin limit is now more even lower because of forgotten password /private keys that has Bitcoin inside their wallets and ledgers.so all in all there are many arguments but literally?yeah Bitcoin has a value.
To pit everything jn a nutshell, bitcoin has a certain value we regard of because we implied a value for it. We implied and calculated using the amount of technology used to create and support it along with the equipments and manners as to how bitcoin is obtained. We have trusted bitcoin's value and bitcoin's credibility that why even if it doesn't exist in the physical world, we are still able to respect it's value. If we hadn't regarded of bitcoin's value as something of significance then it would not have any monetary value, regardless if they used ultra-powered equipment to mine it.