I say the same! Bitcoin is now nearly 10 years old. Would you use a 10 years old computer? or buy one of these? But there are reasons, why BTC will still rise in prize:

The point why Bitcoin will be strong in future, is because IT IS one of the most famous cryptos and a kind of digital gold. The amount is limited and we mined already 17millions/21millions. It's the same like gold. These days it is easyly possible to paint steel with golden color that nobody see the difference, but on the market it is worthless. The price is made in our minds.

The second reason for the btc rise in 2018 will be the fact, to buy nearly EVERY cryptocurrency you need first bitcoins.

The third reason is the lightning network and cheaper sending taxes in the future.

(My opinion, no financal advise)