So get your bitcoin you apply with signing campaigns to get your bitcoin from your project work and should be considered twitter, facebook, telegram and bitcoin hiring from the project.

You can get cryptocurrencies by mining, trading, and join bounty campaign

You can join signature campaigns after upgrading your rank. Or blog campaigns if you are interested in that sort of thing.

There are many ways you could do to obtain bitcoin. These are through cloud mining, mining, faucet, buy and sell, accepting it as a payment for a work, and altcoins as an exchange. This are all I know as of know maybe there is more ways. Every way has different level of risk and requires to be wise to avoid scams or hacking.

Join some bounty campaigns. There you will be able to earn some alt coins which later you will be able to exchange for Bitcoin.

Buying is the easiest thing but you have to prepare money to buy it. or by following a campaign that is still available in free bitcointalk. invest can also be done smartly

To be honest if you want to earn bitcoin than there are many ways to earn bitcoin like cloud mining,mining,fauset site,bounty campaign(preicos,icos),blog writting and making a you tube video .You earn thats way some token or cryptocoins than you can exchange it as bitcoin in many exchanger site.finally you earn bitcoin in trading through buy and sell.

    Those suggestions you have mentioned are truly on point and really are great ways to earn bitcoins. I too have done them and had really made me some good amount of dough. But the thing is, you forgot to mention the most important thing to earn bitcoins or other crypto currencies here in the crypto world. Which are the basics. I cannot stress enough how important it is for a crypto person to know about the basics. Because without this, a crypto person will have a hard to surviving in the crypto world or worse, fail and lose great capitals or have their efforts become useless.

I bought low value coin and wait for the price to rise to convert to bitcoin

you can buy bitcoin at a low price and a small volume then you sell it at a high price. I think that's a reasonable and classic thing for a trader. because optimistic with the low price you will be able to get maximum results.