This is a thought I've had for quiet a while and can't figure out how I would Google the answer nor the math.

If I theoretically had a multi coin wallet with 0% in-wallet trading fees could you play the difference between Bitcoin in a meger day versus an alt bin a good day.

For example I have 1 BTC which went up 1% to $10,000 in the last 12hrs as well as 5 Ethereum which spiked up 15% to $500. Thus if I notice this on the "trade between BTC ETH & XMR free" website and traded my 5 eth for 2500$ of BTC or 0.25 BTC. Would I have made a profit if the charts stabilize them back to 0&0% gains a week later after the market plays with it.

Is they profitable or iis the math evrn further over my head? Or... Does it depend on much more variables? Where or how could I calculate this if there is a profit to be made playing gains and losses in top 5 coins? Again google Snd crazy specific and modified search terms has been zero help for my brain.

Thanks I hope someone knows the basic answer or someone has a link to the real math to decide what to do of it is indeed possibly profitable playing loss gains.