Is helpfulness evident nowadays?

I think most people would say that people nowadays have no knowledge of helpfulness, as this can be seen from incidents in public transports, like people not having the initiative to give up seats to the elderly in the MRT, or bus etc. This, however can be proven wrong, because of a number of experiences that happened to me.
I shall use one of my experience of people having helpfulness over here. I was going back home from school on the bus when i feel asleep. I guess i was too tired, to the extent that did not know that the bus reached the interchange, and went on sleeping. Normally, people would just walk past me without waking me up if they did not have the knowledge of being helpful, but there was this middle-aged guy who woke me up and alerted me that the bus has reached the interchange. People would say this people with the knowledge of helping others would be one in a thousand, but this incident had happened to me not just once, not twice, but a countless time. Hence the point here would be that there are a lot of people out in the world with a helpful heart, ready to help people.
I think that the reason being people not being helpful would be that they had helped someone before and that one person did not express his gratitude to him, and instead took him for granted, or maybe he got scolded for being a busybody, and this probably made the person feel that there is no people who would appreciate him for being helpful, and the next time he sees that there are people who needs help, they would not bother to help the person in need of help.
I think that there are countless number of people who needs our help and we should help them, and we should not stop in our course of doing so just because of some people who are unappreciative, and this brings me to yet another end in my short blog post.