Holding only works with pretty much one coin, bitcoin. If you were holding doge for 6 months you pretty much bought it when it was at its highest. Buying alts when they are at their all time high is NEVER a thing you want to do. Buy bitcoin hold, don't watch the markets and enjoy your capital gains if not tomorrow some day in the near future. Don't dabble too much into alts.
other than that, doge coin is a meme coin. we don't know when the coin really pumps. Yeah, but as of right now, I still don't have a coin meme to hold on to for the long term.
"holding is gold" only applies to popular coins that have a large volume and high need and demand. maybe doge is also included, but i think 6 months is not a long time. if you want to keep them, try holding them for 2 or 3 years, or even more.