Agreed, To let that money earn money is like.. having a fixed deposit that earns interest equal to a salary.
So @5.75% interest (lets say 5% after tax/TDS) and Rs 50K per month salary.. that needs 1.2 crore investment.
However, thats possible with Bitcoin and Banknifty
... Not so sure about youtube, etc
Although Bitcoin sounds more like lottery, banknifty has given great returns in July 17.
e.g. BankNifty Option 24000 CE bought on 04-Jul-2017 for Rs 54 kept gaining value and was valued at Rs 890 at close by 27th July (it even touched a high of 1022.95 on 27th July).
So basically Rs 54,000 became Rs 8.9 Lacs in 1 month .. however this does not happen every month..
Some special attention and consideration needs to be done to identify those possible bullish times.