Are there any coins which give guaranteed returns i.e. give interests after they're deposited for a specific time?
If you like to write or read, definitely buy some pack of steem. Then Send your steems to your steemit account. You can write something every day, and if it's really good, you will get your profit. You will have made a profit because you will vote for yourself with the Steem's you already have. If you say I do not like to write but you like to read, you choose the best things everyday, you vote for what you like. 75% of the rewards of each article remain in the writer while 25% are distributed among the voters.
You should check it!! >>>
www.steemit.comAh yes I forgot to mention steem in my reply, thanks for linking it up here.
Another thing how you can earn there is with these tip bots (can find list here:
https://steembottracker.com/) you need to calculate this tho. In general the idea is that you pay bots to upvote your post and depending on how many people pay and what is the vote power of particular bot. You can look at this website that I have provided and simply see whit which bot you will earn more, sometimes you can lose money if you don't calculate good enough.
Other thing is delegation, delegate your steem power to other users.
You can also at end open up your own voting bot and earn that way or you can "sell your votes" with bots such as minnowbooster
yes current best airdrop coin with solid community and dev is bitcore btx.
I do believe they are giving like 6% per week, although there is a downside that airdrop won't continue forever. Plus price can fluctuate but given the fact that this airdrop is currently running there shouldn't be much dumping since people will hold the coin and take part in airdrop - but you never know.