2. For both trading or hodling to be possible you must own Bitcoin. Although trading requires a minimum amount of coins, hodling does not.
Trading doesn't require a minimum amount of coins, there's no minimum amount as you can trade with any amount but if you're using an exchange that's when you'll have to deposit money based on their deposit minimum of that exchange to trade. You can trade P2P directly without an exchange and you won't need a minimum deposit. Neither trading or holding needs a minimum amount of coin but to make profits you have to decide which amount you'll use to trade because the higher the amount, the more opportunity to get more profits when trading. Both Hodling and trading are guaranteed ways of making profits from Bitcoin but holding holds more pros then cons and that's why we're advice to hodl. You're stressing yourself when you trade when you could have just hodl and make profits.
With all these being said it is important to note that hodling shitcoin is not advisable due to their exponentially high volatility which may lead to severe loss if not properly managed.
Trading and hodling is always a choice as they indirectly serve as balance to the Bitcoin ecosystem.
Shitcoins are to be avoided by all means, they should neither be traded or HODL because they bring nothing but losses. If you're trading them, you have to be very careful because their prices are more volatile and they're been manipulated by whales for their gains. Only trade or hodl bitcoin and you won't find yourself as a victim of the different scams that are becoming a frequent news in the industry.