same question, but i don´t think so: here are the sale instructions https://dragonchain.com/ico-guide/

In my undersstanding its enough to send your ETH to the contract adddress, which is 0x8bA7408497883d3a569066FA3a331aa892138868.

After the end of toke sale you will get your invested amount in DRGN ERC-20 Token in your wallet. Maybe you have to add it through the "customize token" section.

If wrong, appreciate any answer