Re: How can we make people accept bitcoins as a currency?
A lot of scams have caused the fear of theft among people and they are regarding bitcoin and its trading a scam. People seem to be reluctant towards investing in bitcoins. How do we ensure them that bitcoins are not scam but the people are. 
Only time will be able to settle this issue once and for all. Look, everyone loves the American dollar (Continental euro, Chinese yuan, Japanese yen, etc), though you don't see people shouting at street corners that all these currencies are used for every illegal activity that has ever existed since the dawn of civilization (drugs, blackmail, bribery, slavery, child labor, human trafficking, just to name a few). So, essentially, it is a matter of awareness but you can't preach or ensure awareness as it can only come on its own in due course. It should be a natural process as only then the results will be authentic and long-term.
I think giving them the right information about bitcoins is a good start, give them the pros and cons of bitcoins. It's really up to them to figure which side they are, bitcoins is mostly a generous and vigorous currency. It's open to all yet there are still people who exploit it's renown stature and popularity thus scams are always popping up somewhere, giving bitcoin somewhat of a bad repute.
If Bitcoin has genuine value, preaching or raising awareness won't help much. If it doesn't, it won't help at all. Bitcoin is a currency, and as such its existence and features are beyond moral or ethical judgment and valuation. For example, you can't say that a currency is immoral or wicked. It simply doesn't belong to a category of things which allows such verdicts.