Whenever I tell my friends to invest in BitCoin they always say it has no backing or no value, it’s just a bubble etc. Here are the major anti bitcoin concerns

It’s not backed by govt.
It has no real value.
It has no real use
It’s not like stocks where value go up or down based on company’s performance
It value go up or down purely based on people’s enthusiasm
One who enter last will suffer all the loss.
What will happen if miners loss their incentive after mining all the coins
It’s power consumption is so high that one day govts will shutdown all mining operations
What if some other better crypto currency take it’s place like ethereum Ripple litecoin etc.
Quantum computing will crack bitcoin wallets
It’s used for illegal activities

If we anlayse these argument they are true to some extent.Now to address third point

BitCoin has no real use

Here are the list of places where bitcoin is accepted

Head out to 99 bitcoins to see an exhaustive list of place or services where bitcoin is accepted.