Like other asset, we need to spend/use the btc. Otherwise BTC will start to loose popularity. In short term, holding BTC will make BTC more expensive. There will be a good demand and some people among us will buy BTC at very high price. But if we stop to spend BTC in very long term, many people will turn their face away from btc. But I think, this is not going to happen. There will always be a user of btc either a buyer or a seller.
Yup we should do publicity for Bitcoin. Becasue not only in my country in other countries also many people don't know what bitcoin is. And press media and tele media also not supporting to bitcoin. They are not doing any publicity for this bitcoin. So those who know about bitcoin, please share with others and make more bitcoin users. Then only the bitcoin will get more value.