At the current market condition and having bull run in mind, these persons have $10,000 to invest.
Mr. Bob goes 100% with bitcoin.
Miss Alice goes 50% bitcoin and 50% random altcoins.
Mr. theymos goes with bitcoin but $100 weekly DCA.
Miss Alice is going to have a lot of work to do, keeping up to date with these random altcoins for their peaks and ensuring that they are still liquid over time. Otherwise, Miss Alice will probably lose that portion of he portfolio. Especially if they are not researched and completely random altcoins.
Mr. Bob and Mr. Theymos will do just fine if they have a 4+ year time frame and they keep up to date with how the market moves. If they take profit when it is reasonable to do so, and either DCA/rebuy later down the track after the halving cycle has finished, maybe they will both do well with both strategies. It really depends on their discipline and emotion when it comes to selling/holding, not just about the strategy they used to buy.