Since everyone are saying BTC is more reliable for long term hold than altcoins
Whatever you read here on price actions and movements are all speculations and predictions. Don't take anything anyone says with certitude. Leave room for doubt. I had to say that so you know there's no guarantee that Bitcoin will make you profit when you invest too. You're responsible for your own investment. Don't invest based on other people's conviction. DYOR.
do you think it's a good idea to start accumulating bitcoin right now?
Around this price, yes it's good.
Can 5$ per day on BTC makes any changes in few years later?
Yes, just accumulate the $5 weekly or monthly and buy instead of buying daily so you can avoid transaction fees which will eat into your little purchasing power.