Agreed, DOT is a promising project that have gained good market in the shortest time period. From the beginning of its days the value of DOT is found around $3, so we can't expect the market price to $1 for buying. The price is around $5 which is a good buy, if the choice is long term investment. About the project, the development continues and the same keeps the market high than declining.
The DOT is a multi-year consideration with highly meritorious technology. It seems that projects like DOT have the longevity and sustainability needed to deal with a prolonged bear market.
Gavin and his team were the ones who drew me to the project instantly, they were so far ahead, transparent and totally focused. Yes, it's true that Dot is very suitable for long-term investment. I bought it before I finished my research. The main problem with Polkadot is that using its JS wallet is complicated.