Holding bitcoin is not the same thing as trading bitcoin. Gambling and trading are not the same thing too. Trading require you to learn trading skills but gambling require just some strategies. Trading can be risky like gambling, but they are not the same thing. If the price of bitcoin fall already, you can invest for months or years and you will most likely gain.
Do you know that some people contradict the two, when some is in buying and holding bitcoin for long term or short term investment, some people who is new in cryptocurrency especially in bitcoin investment do think that they are trading, you can trade a bitcoin in normal trading but its different from bitcoin investment. The aspect of gambling I think that you did give op a clear clue of the different between gambling and trading very well, but I can as well like op to research the difference between gambling and trading, so that through his findings it will be able to come up with a comprehensive understanding of both.