This video became a major hit because it directly addressed how phrases that are so commonly used can be detrimental to someone's self image and confidence. In the video, various men, women, and young boys are asked to "run like a girl" or "fight like a girl". Then young girls are asked to do the same, with a very different approach: They show strength and confidence in their movements. 
As for me, I started focusing on passive income last year, but have owned rentals for 5 years. $25k now outside retirement accounts in mostly real estate. Looking to invest another $500k cash into real estate to get about $65k, and then 1031 under performers next year to hopefully boost that a bit higher. Heavy in real estate, but feels lower risk than the stock market to me if you have cashflowing properties. Real estate is inflation adjusted, and built in cashflow raise when the loan pays off.
Build an investment portfolio that pays out dividends (Stocks / Bonds / Mutual Funds). Dividends are payouts that companies give to their investors as a portion of their earnings. They’re often paid out quarterly. If you’ve already got an investment portfolio, it’s time to take a good look at which stocks, bonds, or mutual funds you own. You’ll see consistent returns from the ones that pay dividends. This is a fantastic way to earn passive income. Invest once and watch the returns pile up.
Asia's richest man Mukesh Ambani faces data snag as he prepares for Amazon fightReserve right to respond to Pakistan's aggression: IndiaBoredom, 12-3 job at Amazon pushed Binny Bansal to start FlipkartHave a question on P2P? Ask our experts!#IAFStrike: Pakistan boycotts Indian movies, 'Made in India' adsA step-by-step guide to make your first P2P investment

What happens if you have attrition in your customer base over time. An easy way to extend the model to take this into consideration would be to add a variable to model Attrition Rate as a percentage of the entire installed base at each cycle, and simply subract this from the total population at each cycle. This topic is nicely covered in this blog post by Andrew Chen: Is your website a leaky bucket? 4 scenarios for user retention.
The reason to make use or virality, the ease in spreading and sharing, is however a double-edged sword. We cannot forget that in this type of campaign, a large part of the control falls into the hands of the users, and we risk the message being misinterpreted or parodied. On the other hand, a successful viral campaign can work miracles for your brand’s results.