Some Defi Coins play very well on crypto market. Is it good time to invest in Polkadot Coin?
Developers are doing hard work but remember crypto currencies go up or down depending on what the community thinks and what the market thinks. If the community hates something, that means even if developer worked a whole year on it every day for 12 hours a day that would cause it to go down, it would be incredibly upsetting for a developer to work 365 days 12 hours a day but the reality is reality and if there is nothing we can do about this, there is nothing we can do about this, if community hates it the price will go down.
Polkadot is managed by good people, and community likes it and price looks decent enough, which means so far they have done everything right, but remember, IOTA, Tron, Eos and many other coins were top 10 for a while and look where they are right now, it means that Dot is good "now" but we can't know how it will be in the future.